
                       
                             SERIAL SOLUTIONS, INC.

                                   presents


                              "PC BLACKBOARD VGA"



The "PC Blackboard VGA" program is a simple point-to-point interactive 
communication program that can be used on any IBM "XT/AT" compatible PC.  
It allows two PCs to interact over a standard telephone line.  Data transfer 
and interaction may be achieved at varying speeds, depending on the type of 
modem being used.  Quite simply, it provides the same flexibility a teacher 
would have in a classroom, and more.  It allows users to free hand draw and 
add text from the keyboard on a blank screen.  Drawing tools are also 
available to create geometric shapes and lines for flowcharts, diagrams or 
any other conceivable purpose.  Further, the user may send and receive faxes.  
With those received, one may interact on those documents with the interactive 
tools.  Finally, text files created in word processing programs, can be read 
directly into the program.  The document may then be interacted upon.

The idea behind "PC Blackboard VGA" is twofold.  First, it provides a 
complete software solution to enhance a standard phone call.  In this way, 
the user could take the floppy disk to any "XT/AT" compatible machine with a 
modem.  The program then allows the users to interact, so that ambiguous or 
intangible ideas and concepts can expressed more concretely through the use 
of our interactive functions.
Second, with the addition of a fax modem, users can now receive faxes 
directly into their PC.  Simply stated, whatever document you wish to discuss 
is faxed to your computer, displayed on screen, and then annotated upon as 
desired.  Sites on-line can then use the interactive capabilities to 
highlight points of the document, or to add notes to the document.  Moreover, 
anything you put to your screen may be faxed to a fax machine.

The interactive functions include:

   - free hand draw

   - drawing of squares, rectangles, lines, and circles

   - ability to change drawing attributes, such as changing of line widths 
     and having filled or non-filled shapes.

   - keyboard input

   - ability to point

   - screen transfer

   - file transfer.  The file is sent and saved at the remote site.

   - clearing local and remote screen

   - loading and saving of PCX images

   - loading of .TXT files

   - receiving, sending, and loading of fax documents

   - Ability to change drawing color and background color.

   - ability to undo your annotations.

   - ability to selectively erase your annotations.

   - ability to print out your screen, images, and/or faxes.


We at Serial Solutions feel this will help diminish those frustrating calls 
where it takes hours to explain ideas and concepts, that should only take 
minutes.  Also, this cuts down on unnecessary business travel, which is 
necessitated by the inability to explain ideas thoroughly through language 
alone.  This is accomplished most through the ability to control what is on 
both screens.  That is, for a multi-page document it is very difficult to get 
people on the correct page, paragraph, and/or sentence.  Now, since the 
document is displayed at both sites, this confusion factor is eliminated.  
The users all see the same portion of the document and may then interact on 
those portions together.  Then as one site scrolls through the document, the 
document is automatically scrolled through at the remote site.


Technical Requirements
The only requirements for this program are:
  1) An IBM "XT/AT" compatible PC
  2) A VGA card or higher
  3) A pointing device (mouse or graphics tablet) is necessary for free hand 
     draw, and the drawing of shapes.
  4) A fax modem board




                       CURSOR ACTION VIA INPUT DEVICES

Movement is achieved by moving your pointing device (mouse or stylus) or by 
using the arrow keys on the keyboard.  All the functionality of this program 
can be reached via pop-up menus through the keyboard, a mouse, and/or a Summa 
compatible graphics tablet.  You may use both a mouse and a tablet in the 
program; you are not limited to one or the other.  However, additional serial 
ports may be necessary.

Keyboard
The keyboard can be used to move the cursor, pop-up the main menu, select and 
change options within the main menu and submenus, use function keys for 
special options, and enter text.  The location of the cursor on the screen 
determines where text will be placed on the screen.  If you have a tablet 
installed, make sure that the stylus is not on the tablet, or your text will 
all occur in the same location.  In other words, you will keep putting each 
character on top of the preceding character.
The arrow keys will move the cursor to the left, right, up, or down, 
depending on which arrow key is pushed.  However, the cursor will only move 
one pixel at a time, so it will be very slow to move around the screen.  The 
keys to remember are:

Escape <Esc> - The Escape key has three uses.  First, it will call up the 
               main menu if there are no menus on the screen. Second, it will 
               exit from any menu that you are currently in. Third, it will 
               cancel the drawing of a circle, line, square, or rectangle if 
               hit while the ghost image is on the screen.  (This third action 
               will only take place while you are either holding the left 
               button of a mouse down, or while holding down on the stylus.
               
Enter - The <Enter> key has three uses. First, if a menu is on the screen, it 
        will activate the highlighted option, or change the option in which 
        the cursor is located.  This depends on the type of menu which exists 
        on the screen.  Second, if there are no menus on the screen, this 
        will move your cursor to the left side of the screen, and down one 
        text line. This is used mostly for the entering of text. Third, the 
        <Enter> key is required to follow the name inputted for the name of a 
        file which is to be loaded, saved, or transmitted. You do not have to 
        enter the name, because you can find all files with your pointing 
        device, but it may be quicker to simply enter the file name.  Further, 
        after entering the phone number of a remote site, you must hit the 
        <Enter> key to complete the call. 
        
Mouse
The mouse allows you to access all menus, access all items within those 
menus, and utilize all tools.  To move the cursor, simply move your mouse.  
To pull up the main menu, click the middle button of a three button mouse, or 
the first and second buttons simultaneously of a two button mouse.  To select 
an option within a menu, click the left button when the desired option is 
highlighted or when the cursor is in a location to change an option, 
depending on the type of menu.  To leave or escape from a menu, hit the 
right button.
When there are no menus on the screen, you can change your drawing tool by 
clicking the right button.  This will scroll through the available tools.  
Your cursor will change to the shape of the new tool.

Tablet
The tablet allows you to access all items within menus and to utilize all 
tools.  To move the cursor, simply move your stylus without actually pressing 
down.  The only way to pull up the main menu if you only have a tablet, is to 
hit the <Esc> key on the keyboard.  To select an option within a menu, push 
the stylus down on the tablet when the desired option is highlighted, or when 
the cursor is in a location to change an option.  To leave or escape from a 
menu, push the button on the stylus.
When there are no menus on the screen, you can change your drawing tool by 
pushing the button on the stylus.  This will scroll through the available 
tools.  Your cursor will change to the shape of the new tool.
To use a tool, position your cursor where you wish to start, then push the 
stylus down on the tablet.  This is the same as clicking the left button on 
the mouse.
See mouse section for further instructions.

Select\Deselect
Before proceeding, some terms need to be defined.  The term "select" means to 
(1) hit the Enter key from the keyboard, (2) click on the left button of the 
mouse, and/or (3) push down on the stylus.
The term "deselect" means to (1) hit Escape on the keyboard, (2) click the 
right button of the mouse, and/or (3) push the button on the stylus.



                                Drawing Tools

This program provides six drawing tools, all represented by different cursors.  
The shape of the cursor determines which tool you are using.  These tools are 
changed by either clicking on the right button of your mouse or by pushing 
the button on the stylus when there are no menus on the screen.   
To use a tool, position your cursor where you wish to start.  Then click on 
your left button.  The following lists what happens for each tool:

Free hand draw: This is represented by the Pencil Icon.  As you move while 
                holding down the left button of a mouse or holding down the 
                pen, you will draw a continuous line. 

Rectangle : This is represented by the Rectangle Icon, which is more 
            elongated than the third drawing tool. As you move while holding 
            down the left button of a mouse or holding down the pen, you will 
            see a ghost box.  You may move this ghost box above or below your 
            starting point, as well as to the left or to the right of your 
            starting point.  If  you let up on the left button of the mouse
            or let up the pen, the rectangle will be drawn with the present 
            attributes, with the coordinates you have specified by the ghost 
            box.  If you do not wish to draw the rectangle, simply deselect 
            it. This will erase the ghost box. 
            
Square: This allows you to draw perfect squares.  Square is exactly like 
        rectangle except that you can only move the ghost box to the right 
        and below of your starting point.

Line: The fourth drawing tool is the line drawing tool.  It is represented by 
      the angled line, similar to back slash on the keyboard ("/").  As you 
      move while holding the left button of  the mouse down or holding down 
      the pen, a ghost line will appear that extends to your new position on 
      the screen.  If you release the left button or let up on the pen, the 
      line will be drawn with its current attributes between the points 
      specified by your ghost line.  If you do not wish to draw the line, 
      simply deselect.  This will erase the ghost line.

Circle: The fifth tool is the circle tool.  This allows the user to draw 
        circles.  As you move while holding the left button of a mouse down 
        or by holding down the pen, a ghost circle will appear that grows as 
        you move your pointing device.  If you wish to draw the circle, just 
        let up the left button or the pen. If you do not wish to draw the 
        circle,  deselect it. This will erase the ghost circle.

Point: The final tool is the pointer.  It is represented by the upward arrow.  
       Point is slightly different than the other tools.  Locally, you always 
       see the pointer.  But if connected, the remote will only see the 
       pointer while you push the left button or hold down the pen.  As long 
       as you hold down the left button, the pointer will be displayed at the 
       remote site.


Selective Erase: This feature allows the user to remove annotation from a 
                 user defined area on the screen.  It is represented by the 
                 cross cursor.  The user then positions this cross where 
                 he/she wishes to remove annotation.  A ghost box will 
                 appear.  Drag the box to enclose the desired area to be 
                 erased and let up on the pen or release the left button of 
                 the mouse.  This works just like the rectangle drawing tool.  
                 Any annotation within the box will now be removed from the 
                 image.  If you do not wish to erase that particular area on 
                 the screen, deselect it.  If you had previously saved the 
                 image with the annotation, you will not be able to erase 
                 those annotations.  Therefore, you may only erase annotation 
                 marks since the last save.


NOTE: if using a mouse and you wish to deselect the ghost box with the mouse, 
      you must click the right button while you are holding down the left 
      button.  If you wish to deselect the ghost box with the pen, you must 
      push the blue button while holding the pen down.




                            MAIN MENU OPTIONS

The Main Menu provides you with all the functionality that the "PC Blackboard 
VGA" program offers.  This is the first menu that the user will encounter.  
It can be accessed by: (1) hitting the Escape key on the keyboard, (2) 
clicking the middle button of a three button mouse, or (3) clicking the left 
and right buttons of a mouse simultaneously.  If using a tablet, the stylus 
can not bring up the main menu.  Each option of the main menu will be 
explained in detail later.  The option is chosen by moving the highlight bar 
to the desired function.  This can be done with the arrow keys on the 
keyboard, by moving the mouse, or by moving the stylus.  Once you are at the 
desired option, select it.  Then, depending on the chosen option, it will 
either complete the function or go to a submenu.  The main menu provides the 
user with ten options: attributes, communications, configuration, print menu, 
files menu, fax menu, text menu, send screen, undo, clear screen, and exit.





                                ATTRIBUTES

The attribute option allows you to change the features for the presently 
chosen tool.  Some tools have more attributes than others.  For draw and 
line, you have the options to change the color and the line width.  For 
rectangle, square, and circle, you can change the color, the line width, and 
you may have the object be filled or not.  If you choose fill, the line width 
will not have any effect.  For pointer, you can only change the color.  Erase 
does not have any attributes.

You can change the color by selecting the "Palette" box.  You may now choose 
one of the sixteen shades of grey by selecting on the box containing your 
desired color.  You will notice that your currently selected color is 
displayed in the big box to the left of the palette. 

You can change the line width by moving your cursor along the grid.  As the 
box in the grid moves to the right, your line width will increase.  The 
actual line width is represented above this grid.  As you move to the left, 
your line width will decrease.  The minimum line width is one, and the 
maximum line width is four.

For tools having the fill option, you can toggle between having filled on or 
off by positioning your cursor on the box where the word "ON" or "OFF" 
appears.  By selecting on this box, you will toggle to the opposite of what 
is currently displayed.  That is, if the word "ON" appears, by selecting on 
this, the word "OFF" will appear.  This means that previously the tool had 
fill turned on, now it has fill turned off.  Thus, your shape will just be 
an outline.
Once you have set the attributes, you can leave the attribute menu by 
deselecting it.  If you have fill "OFF", the width of the outline will then 
be determined by the line width you chose.




                              COMMUNICATIONS

This menu allows you to establish a call, disconnect a call, and toggle 
between on-line and off-line.

1) Call Status
Call status tells you whether you are on-line or off-line with your remote 
site.  This can only be selected if you have already established a connection.  
If you are connected, but wish to do something locally that you do not want 
the remote to see, you may want to go off-line without disconnecting.  By 
selecting on this box, it will toggle between off-line and on-line.  If you 
go off-line, you will be able to do everything except send or receive data.  
If you go off-line and wish to go back on-line, just select on this box again.  
A message will occur in the middle of your screen with the word "On-Line" or 
"Off-Line", depending on which state the modem is in.

  NOTE: F1 does the same thing and it is much quicker to access.

2) Connect
Connect allows you to interact with a remote PC.  Connect works differently 
for a modem and for a Null modem. 

A) Null Modem
   If you are using a Null modem, this will call the other PC automatically.  
   You will not need to input a phone number. If the connection is made, 
   both sites will be notified. 
     
B) Normal Modem
   This process works differently for a modem.  The user will be asked to 
   enter the phone number of the remote site.  You may enter the phone number 
   just as you usually would, with or without hyphens.  For example, 
   303-347-8547 and 3034478547 are handled the same.

Once you have entered the number, hit the Enter key and the modem will call 
the remote.  If a connection is made, you will get a message that either says 
which modem is connected or at which baud rate you are connected.  If you are 
using the Telebit Trailblazer or the AT&T   Comsphere, the message will say 
"Connect Fast" or "Comsphere Connection" respectively.  Otherwise, the 
message will give the baud rate value at which you've actually connected.  
Further, the Call Status box will change from "Off-line" to "On-line".

An important dial command to know is the comma.

   ,  - a comma is a two second pause.  A pause may be necessary when you 
        have to wait for an outside line.  This command is useful when 
        dialing out of a PBX (Private Branch Exchange), or when making a 
        long distance call.  If you have to dial a 9 before dialing the 
        phone number, or a 1 for a long distance call, the comma would 
        follow the 9 and 1. Example of a long distance call through a PBX,
        9,1,303-347-8547 If the delay is not long enough with one comma, you 
        may enter multiple commas.

Before making a call, both sites must verify that they have each chosen the 
same communication device and are at the same baud rate.  If both sites are 
not setup the same, there is a good chance that the connection will fail.  If 
you are using a modem and both sites do not have the same modem, then select 
Hayes compatible.  This will allow different types of modems to communicate 
with one another.  Remember, if you are using a Telebit Trailblazer in Hayes 
Compatible mode, you must manually set it to conventional mode.  

IMPORTANT: While attempting to call another PC, the other PC should not have 
           any menus on the screen. This will allow the receiving site to see 
           the "Incoming Message" signal, as well as the connection message.  
           This tells the receiver that a call is coming in, and that a 
           connection has occurred. 

3) Disconnect
Disconnect does exactly what it says.  If you are connected to a remote site, 
this will disconnect the call.  This is done by simply selecting on the 
DISCONNECT box.  If the call is disconnected, the word "Off-line" will appear 
in the CALL STATUS box.  The calling site will get a message in the middle of 
their screen telling the user that he/she is going off-line.  The user will 
then have a message displayed to his/her screen that the call has been 
disconnected.  The receiving site will also have a message saying that the 
call is being disconnected.





                               CONFIGURATION

This menu allows you to setup both your communication device and tablet.  The 
first two items listed in the menu show which graphics card you are using, 
and if a mouse has been installed.  The second two options allow you to 
change your communication parameters and/or your tablet parameters.  To 
change your communication parameters, select "Modem Setup".  To change your 
tablet parameters, select "Tablet Setup".

MODEM SETUP
Modem setup has six options: device type, com port, baud rate, address, 
interrupt number, and initialize.

1) Device
The device option allows you to choose your specific mode of communication.  
Generally, this contains the  type of modem you are going to use.  This 
program supports all Hayes compatible modems, the Telebit Trailblazer modem, 
and the AT&T Comsphere 3820.  The software allows a NULL Modem, which is a 
special cable used to allow two PCs to communicate with one another at the 
same site.  The final choice is "None", which means that neither a modem or 
cable exists.  You may choose the modem type of your choice by selecting on 
the box to the right of DEVICE.  This will scroll through your options.  The 
following is a list of acceptable modems and their capabilities.

Null Modem: Select this if you are using a direct connection (a special 
            cable) from one PC to another.

Hayes Compatible: If you are not using a Telebit Trailblazer or AT&T 
                  Comsphere modem, you must select Hayes Compatible.  You 
                  should also verify that your modem is truly Hayes 
                  Compatible.  (See your specific modem manual)

Telebit Trailblazer: The Telebit Trailblazer allows you to transmit at speeds 
                     of up to 19200 bits per second (bps).  For the Telebit 
                     Trailblazer to work in Hayes Compatible mode, you must 
                     manually set it to conventional mode.  (See your Telebit 
                     manual)

AT&T Comsphere 3820: This modem allows you to communicate with your modem at 
                     speeds up to 115,200 bps.

2) Com Port
This is where you tell the program where your communication device (modem or 
Null modem) is connected.  You have a possibility of four com ports.  
Therefore, by selecting on the box to the right of COM PORT, you will scroll 
through your options.  It is up to the user to determine which port the 
communication device is connected.  If you choose an incorrect com port, the 
word "None" will appear in the DEVICE box and you will get a message saying 
"Modem Not Found".  If a tablet is connected, you will not be allowed to 
change the com port to the tablet com port.

3) Baud Rate
Baud rate determines the rate at which data is sent.  The software allows for 
data rates from 1200 bps to 115,200 bps.  Although these speeds are available, 
not all modems can use the high-end speeds.  It is up to the user to know 
what speeds your modem handles.  If you set a baud rate which the modem 
cannot handle, you will get a message saying "Modem Not Found" and "None" 
will appear in the DEVICE box.

4) Address
Address shows where the chosen com port can be located within the machine.  
This option is for experienced users.  A default address will appear for each 
com port.  If you are using a device (such as a fax modem) that uses unique 
addresses for their comports, this default value will need to be changed.  
Your particular communication device manual will list these values.  If a 
change is required, select on the box next to "Address".  A box will appear 
waiting for you to input the desired address.  If after choosing this box you 
wish to keep the old address, just deselect the box.  Otherwise, type in the 
address and hit the <ENTER> key.

5) Interrupt Number
Each com port must have a unique interrupt request number.  A default value 
will appear for the com port chosen, but if you are using a device, such as a 
fax modem, that allows the user to manually change interrupt values, the user 
will need to enter this new interrupt number.  Again, this is used for 
experienced users.  An invalid value can create serious problems.  If you do 
wish to change the address, select the box to the right of "Interrupt #".  A 
box will appear awaiting the user to enter the new interrupt value.  If after 
choosing this box, you wish to keep the old interrupt number, just deselect 
the box.  Otherwise, type in the interrupt number and hit the <Enter> key.

6) Initialize
The initialize button allows you to initialize the modem.  The modem will 
automatically be initialized when you leave the modem setup after changing 
one of the above options.  However, there may be a case in which you need to 
initialize the modem without changing any of the above options.  To do so, 
select the "Initialize" box.  The messages displayed will tell you if the 
modem was installed or not.

NOTE: You cannot change any of the parameters within the modem setup if you 
      are already on-line.  Furthermore, if DEVICE is set to none, ADDRESS is 
      set to zero, or INTERRUPT NUMBER is zero you will not be able to select 
      any box until you select a communication device.  If you have changed 
      any of the above options, you will be notified that the new parameters 
      are being used to setup the com port and modem.


TABLET SETUP
Tablet setup has six options: size, com port, baud rate, address, interrupt 
number, and initialize.

1) Size
The size option allows you to select the size of graphics tablet you are 
using.  If no tablet exists, the box will be labeled "None".  The two sizes 
available are "12 x 12" and "6 x 9." You may choose the tablet size of your 
choice by selecting on the box to the right of SIZE.  This will scroll 
through your options.

2) Com Port
This is where you tell the program where your graphics tablet is connected.  
You have a possibility of four com ports.  Therefore, by selecting on the box 
to the right of COM PORT, you will scroll through your options.  It is up to 
the user to determine which port the communication device is connected.  If 
you choose an incorrect com port, the word "None" will appear in the SIZE box 
and you will get a message saying "Tablet Not Found".  If a modem is selected, 
you will not be allowed to change the com port to the modem com port.

3) Baud Rate
Baud rate determines the rate at which data is sent.  The software allows for 
data rates from 1200 bps to 115,200 bps.  Although these speeds are available, 
you are advised not to change the default value of 9600.  Most graphic 
tablets use a baud rate of 9600, and if you change this value the tablet will 
most likely not work. If you set a baud rate which the tablet cannot handle, 
you will get a message saying "Tablet Not Found" and "None" will appear in 
the SIZE box.

4) Address
Address shows where the chosen com port can be located.  This option is for 
experienced users.  A default address will appear for each com port.  In most 
cases, the default value will be correct for the tablet.  If a change is 
required, select on the box next to "Address".  A box will appear waiting for 
you to input the desired address.  If after choosing this box, you wish to 
keep the old address, simply deselect the box.  Otherwise, type in the 
address and hit the <ENTER> key.

5) Interrupt Number
Each com port must have a unique interrupt request number.  A default value 
will appear for the com port chosen.  Again, this is for experienced users.  
An invalid value can create serious problems.  If you do wish to change the 
address, select the box to the right of "Interrupt #".  A box will appear 
awaiting the user to enter the new interrupt value.  If after choosing this 
box, you wish to keep the old interrupt number, just deselect the box.  
Otherwise, type in the interrupt number and hit the <ENTER> key.


6) Initialize
The initialize button allows you to initialize the tablet.  The tablet will 
automatically be initialized when you leave the Tablet Setup after changing 
one of the above options.  However, there may be a case in which you need to 
initialize the tablet without changing any of the above options.  One such 
example would be if you shock the tablet.  This will, in some cases, "knock 
out" the tablet.  Thus, you will need to re-initialize the tablet.  To do so, 
select the "Initialize" box.  The messages displayed will tell you if the 
tablet is installed or not.

NOTE: The tablet will not be initialized if "NONE" appears in the SIZE box, 
      if the ADDRESS is zero, and/or if the INTERRUPT # is zero.  Furthermore, 
      if SIZE is set to none, you will not be able to select any box until you 
      select a tablet size.  If you have changed any of the above options, you 
      will be notified if the tablet is installed.

To leave the configuration menu, simply deselect it.



                                  PRINT MENU

1) Print File
Print file allows you to print any .PCX images, .TXT or .FAX files.  Select 
the file of your choice just as you would for load file.  You can either 
scroll through the possible files or enter the file name.  You must add the 
file extension if you manually input the file name.  Once you have selected a 
file to be printed, you will see a box in the middle of your screen which says 
"SAVING PRINT FILE."  If you wish to stop printing the document for any 
reason, hit the <Esc> button on your keyboard.  This will bring up an error 
box on your screen, notifying you that the printing was aborted.  Otherwise, 
the document will be printed.

2) Print Screen/Page
Print screen allows you to print the currently displayed page or image. If 
you have annotated on the currently displayed page, those annotations will 
also be included.
If you wish to stop printing the screen or page for any reason, hit the <Esc> 
button on your keyboard.  This will bring up an error box on your screen, 
notifying you that the printing was aborted.  Otherwise, the document will be 
printed.   




                                   FILES

The files menu provides the user with six options.  It allows you to save and 
load any screens created in this program and/or received faxes, send any file 
to a remote location, change the current drive and directory, and delete any 
.PCX, .TXT and .FAX files.

1) Save File
To save your screen or currently displayed page of a document, select on the 
save box.  You may save the screen to the file name of your choice, or to an 
existing .PCX file.

A) Save a File via the Scrolling Box
   To save your screen to an existing file, just select that file name when 
   it is highlighted.  
   A maximum of five files will appear in the box.  To see the remaining 
   files, move your cursor to the down arrow and select it, and it will scroll 
   through the files.  To see files that were at the top your list, just move 
   your cursor to the up arrow.  This will scroll through the files.

B) Manually Entering File Name
   To save the screen to a new file name or to a file name that already 
   exists, just enter the new file name via the keyboard.  You may wish to 
   simply type in the name of the file, even if it already exists, since it 
   may take time to find the correct file by scrolling through all the .PCX 
   images.  A window will pop-up and your file name will appear as you type 
   it.  You do not need to give a file extension, since .PCX will be 
   automatically appended to the name.

If you do not wish to save the image, deselect it.

NOTE: F4 will do the same.  It allows you to save the screen to a filename of 
      your choice.  A window will appear for your input.

2) Save As
A window will appear waiting for you to enter your desired file name.  Once 
you have entered the name, hit the <Enter> key.  You do not need to give a 
file extension, since .PCX will be automatically appended to the name.  If 
you do not wish to save the image, deselect it.

NOTE: F4 will allow you to save the screen to a filename of your choice.  A 
      window will appear waiting for your input.

3) Load File
You can load any .PCX, .TXT, or .FAX files that exist in the current 
directory.  To load, select on the load box.  If there are none of these 
files, you will be told so.

A) Load a File via the Scrolling Box
   If you wish to load one of these, move the highlight bar to the desired 
   file and select it.
   A maximum of five files will be in the window at one time.  If there are 
   more in the directory, then by moving your cursor to the down arrow and 
   selecting it will scroll through the other files.

B) Entering the File Name Manually
   If you wish to enter the name of the file without trying  to locate it by 
   scrolling through all the files, enter the file name when the window of 
   all possible images is on the screen.  A window will pop up and the name 
   of the file will occur as you type it.  You will need to add the correct 
   extension.  When you have completed the title, hit the <Enter> key.

If you do not wish to select a file, deselect this window.

If you are connected to another PC and this image also exists on that machine, 
you will automatically load this image on the remote screen.

NOTE: If you have loaded a fax file, a .TXT file, or a .PCX  image that was 
      previously a fax or .TXT page, you will notice that only a portion of 
      the page is on the screen.  (See the Document Pages section on page for 
      a discussion on individual pages.)

4) Send File
Send file allows you to send any file to another PC, if you have already 
established a connection.  It will be saved in the remote's current directory.  
You select the file of your choice just as you would for load and save file.  
You can either scroll through the possible files or enter the filename.  In 
this case, you must add the file extension if you manually input the file 
name.  Once you have selected a file, a window will pop up with the file to 
be sent, as well as the total number of packets to be sent and a running 
count of the number of packets sent.  The remote site will have the same 
window on their screen, so that the remote site realizes that a file is 
being received.  It too, will have a running count of received packets.  
Thus, this is a very useful file transfer feature.  The remote site cannot 
have any menus on the screen, or the file will not be received.
If you wish to stop sending the file for any reason, hit the Escape button on 
your keyboard.  This will bring up an error box on your screen, notifying you 
that the transmission was aborted.

5) Directory
The directory option allows you to change your current drive and directory to 
any existing drive and directory.

A) Change Drive
   To change the drive, select drive when it is highlighted. This will then 
   bring up a window with all available drives.  Just select the desired one.  
   To leave the drive menu, deselect it.


NOTE: If you choose drive "A" or "B", make sure that a disk is in the desired 
      drive and that the door is shut if it is a 5 1/4 drive.  Otherwise, you 
      will be notified by an error message.

B) Change Directory
   To change directory, move the highlight bar to the desired directory and 
   select it.  The ".." option will take you to the parent directory of the 
   current directory.  To leave the directory menu, deselect it.

To leave the Directory Menu, simply deselect it. You will notice that when 
you return to the main directory menu, that your current path is shown below 
the menu.  This is to help you make sure that you are in the path of your 
choice.

6) Delete
The delete option allows you to delete .PCX, .TXT, and .FAX files from your 
current directory.  This will bring up all .PCX, .TXT, and .FAX images in the 
current directory.  If there are none, you will be told so.

A) Delete a File via the Scrolling Box
   If you wish to delete one of these, move the highlight bar to the desired 
   file and select it.  A maximum of five files will be in the window at one 
   time.  If there are more in the directory, then by moving your cursor to 
   the down arrow and selecting it will continue scrolling through the other 
   files.

B) Entering the File Name Manually
   If you wish to enter the name of the file without locating it by scrolling 
   through all the files, enter the filename when the window of all possible 
   images is on the screen.  A window will pop up and the name of the file 
   will occur as you type it.  You will need to add the correct extension.  
   When you have completed the title, hit the <Enter> key.

Once you have selected a file, a window will appear asking to verify if you 
wish to delete the file.  If you are sure that this is the file you wish to 
delete, select "YES".  Otherwise, select "NO".  If you select "YES", the file 
will be deleted.  If you select "NO", nothing will happen.

If you do not wish to select a file, deselect this window.





                                  FAX MENU

The Fax Menu provides the user with four options.  It allows you to send a 
.FAX or .PCX file to a fax machine, fax a screen to a fax machine, rename a 
received fax, and change the current drive and directory.

1) Fax File
Fax file allows you to send any .FAX, .TXT, or .PCX images to a fax machine.  
You select the file of your choice just as you would for load fax file.  You 
can either scroll through the possible files or enter the file name.  You 
must add the file extension if you manually input the file name.  To use this 
feature, you must first select "FAX BOARD" in your communications menu as 
your communications device.  Once you have selected a file to be faxed, you 
will see a box in the middle of your screen which says "CONVERTING TO FAX 
FORMAT."  Depending on the complexity of the image and the number of pages in 
the file, this could take a few minutes to get set-up.  Once the conversion 
is complete, a window will appear with the number of pages to be sent and a 
running count of the number of pages sent.  Further, a window will appear 
asking you to enter the fax machine's phone number.  If you do not wish to 
fax this document at this time, deselect.  Otherwise, after the number has 
been entered, your PC will call the fax machine and send the document page 
by page.
If you wish to stop sending the document to the fax machine for any reason, 
hit the Escape button on your keyboard.  This will bring up an error box on 
your screen, notifying you that the transmission was aborted.  Otherwise, 
after the document has been faxed completely, the Fax box will disappear, and 
you will return to the Fax Menu.

2) Fax Screen
Fax screen allows you to send your screen, or particular page, to a fax 
machine.  When this feature is selected, you may have two options.  If you 
are displaying a page of a multi-page document, you will be asked if you wish 
to send the entire document.  To answer "YES", you can either highlight the 
"YES" and select it, or hit 'Y' or 'y' on your keyboard.
To answer "NO", you may highlight the "NO" and select it, hit 'N' or 'n' on 
the keyboard, or simply deselect this box.
If you answered "YES", the entire document will be faxed.  If you have 
annotated on the currently displayed page, those annotations will also be 
included.  If you answered "NO", only the current page, with its annotation, 
will be faxed.

NOTE: If you are displaying a screen image (one that does not go beyond the 
      limits of the screen), or a single page fax, you will not be prompted 
      with this question.

To use this feature, you must first select "FAX BOARD" in your communications 
menu as your communications device.  Once you have selected a file to be 
faxed, you will see a box in the middle of your screen which says "CONVERTING 
TO FAX FORMAT."  Depending on the complexity of the image and the number of 
pages in the file, this could take a few minutes to get setup.  Once the 
conversion is complete, a window will appear with the number of pages to be 
sent and a running count of the number of pages sent.  Further, another 
window will appear, asking you to enter the fax machine's phone number.  If 
you do not wish to fax your screen at this time, deselect.  Otherwise, after 
the number has been entered, your PC will call the fax machine and send your 
current screen page by page.
If you wish to stop sending the document to the fax machine for any reason, 
hit the <Esc> button on your keyboard.  This will bring up an error box on 
your screen, notifying you that the transmission was aborted. Otherwise, 
after the screen has been faxed completely, the Fax box will disappear, and 
you will return to the Fax Menu.

3) Rename Fax
Rename fax allows you to rename a fax document to another fax document.  The 
reason for this is due to the way "PC Blackboard VGA" saves incoming faxes.  
"PC Blackboard VGA" will provide a unique name to each received fax.  It will 
consist of six numbers and two characters.  The first six numbers are a 
combination of the day, month, and hour.  The last two characters are created 
to insure uniqueness.  It is recommended that you rename these files with a 
name which is more descriptive of the fax itself.

4) Directory
The directory option allows you to change your current drive and directory to 
any existing drive and directory.

A) Change Drive
   To change the drive, select drive when it is highlighted. This will then 
   bring up a window with all available drives.  Select the desired one.  To 
   leave the drive menu, deselect it.

NOTE: If you choose drive "A" or "B", make sure that a disk is in the desired 
      drive and that the door is shut if it is a 5 1/4 drive.  Otherwise, you 
      will be notified by an error message.

B) Change Directory
   To change directory, move the highlight bar to the desired directory and 
   select it.  The ".." option will take you to the parent directory of the 
   current directory.  To leave the directory menu, deselect it.

To leave the Directory Menu, simply deselect it.  You will notice that when 
you return to the main directory menu, that your current path is shown below 
the menu.  This is ensure that you are in the path of your choice.




                                  TEXT MENU

The text menu allows you to change the color and size of your text.  After 
choosing Text Menu from the main menu, a window will appear with a palette 
button, and an "X" and "Y" box.  
To change the color, select Palette and select your desired color just as you 
would do from the attribute menu.
For size, you may change the either the "X" (width) or "Y" (height).  To 
change these, select on the white box, which contains the current size, to 
the right of the "X" or "Y".

X (width)  Directly to the right of the x button is a window that has the 
numerical value for the current x text size.  To change the x text value, 
position your cursor over the window containing the current size and select 
it.  Now, as you move your pointing device to the left and right, the value 
will change.  If you get to the desired size value, select it.  If you do not 
wish to change the value, deselect it.

Y (height)  Directly to the right of the y button is a window that has the 
numerical value for the current y text size.  To change the y text value, 
position your cursor over the window containing the current size and select 
it.  Now, as you move your pointing device to the left and right, the value 
will change.  If you get to the desired size value, select it.  If you do not 
wish to change the value, deselect it.

Once you have set the text attributes, deselect the text menu.  Now when you 
put text to the screen, it will take on the attributes you setup.




                                 SEND SCREEN

If you are connected to a another PC, this will send your screen to the 
remote's screen.  Once again, the remote cannot have any menus on the screen, 
or the screen will not be received.  A box will appear at both sites showing 
the users the percentage of data sent and received.

NOTE: Hitting the F3 key on the keyboard will also send your screen to the 
      other PC.  This is usually more convenient than going back to the main 
      menu to send your screen.

If you wish to stop sending the screen for any reason, hit the Escape button 
on your keyboard.  This will bring up an error box on your screen, notifying 
you that the transmission was aborted.




                                     UNDO

The undo feature will remove all annotations from the screen since the last 
save of the image.  This includes free hand draw, shapes, and text.  This 
means that the original image will now be in place, without the annotation.  
If you wish to make any annotation permanent, save the image via the files 
menu.  If you do save the image, UNDO will not remove the marks made prior to 
saving the image.
To UNDO, simply select "UNDO" from the Main Menu.  If there is not enough 
disk space for UNDO, you will get an error message and be returned to the 
Main Menu.  If there is enough disk space, all annotation marks made since 
the last save will be removed.





                               CLEAR SCREEN

You may clear your screen to anyone of the sixteen shades of grey.  If you 
select the "Clear" box, your screen will be cleared to your currently chosen 
background color.  If you wish to select a new background color, select the 
"Palette" box.  This will bring up the sixteen available colors.  Your 
currently chosen background, will be displayed in the big box to the left of 
the sixteen grey shades.  If you wish to change the color, select the box 
that contains your desired color.  You must now exit the "Palette" by 
deselecting it.  You may then select "Clear" to clear your screen to your new 
color.  If you are connected to another PC, it will clear their screen also.


NOTE: Hitting the F2 key on the keyboard will also clear your screen.  This 
      is usually more convenient than going back to the main menu to clear 
      your screen.






                                     EXIT

The final option on the menu is Exit.  This will exit you from the "PC 
Blackboard VGA" program and return you to DOS.  If you are connected, it will 
disconnect the call first, then exit to DOS.

NOTE: All drawing tool attributes and all parameters for communications and 
      the tablet are saved so that the next time you enter the "PC Blackboard 
      VGA" program, they will all be just as you left them.




                                DOCUMENT PAGES

Documents received from a fax machine, as well as .TXT files and any 
oversized .PCX images are displayed differently than images created in the 
"PC Blackboard VGA" program.  Only a portion of each page can be shown at one 
time.  This is due to the fact that it would be impossible to comprehend the 
information if it was constrained by the area on your monitor.  Therefore, we 
have created a virtual page.  That is, each page extends below the screen.  
Through the document queue, the user can then scroll through the document.  
The options will appear in a queue in the bottom, right hand corner of the 
screen.  This queue will allow you to scroll up and down, jump to the top of 
the page, jump to the bottom of the page, and go to a particular page of a 
multi-page document.  This queue is the interface for the document pages.  As 
you move your cursor towards the bottom of the screen, your cursor will change 
to a CROSS.  As you position your cursor over the desired icon and select it, 
the function associated with that icon will occur.  The following list 
provides a description of the document queue's options.

A) Scroll Up: This is represented by the arrow pointing up. This will allow 
              you to scroll toward the top of the document.  That is, portions 
              of the page that lie above your currently displayed page will 
              now be displayed, while less of the bottom portion will be 
              displayed.  When you have reached the top of the document, this 
              function will have no effect.

B) Scroll Down: This is represented by the arrow pointing down.  This will 
                allow you to scroll towards the bottom of the document.  That 
                is, portions of the page which are  below your currently 
                displayed portion will now be displayed, while less of the 
                currently displayed portion will be on the screen. When you 
                have reached the bottom of the document page, this function 
                will have no effect.

C) Top of Page: This is represented by the capitol 'T'. This will 
                automatically jump to top of the image.  This is more 
                convenient than continually scrolling to the top of the page.  
                Basically, this is used to save the user the time of 
                scrolling.

D) Bottom of Page: This is represented by the capitol 'B'. This is similar to 
                   the Top of Page function, except that it jumps to the 
                   bottom of the page.  Again, this is meant to save the user 
                   from continually scrolling down the page.

E) Change Page: This is represented by the current page number.  When you 
                first load a document, the number '1' will appear in this box.  
                If you touch on this box, another box will appear in the 
                middle of your screen.  This box will allow you to display 
                any page that exists in the document.  As you move your 
                pointing device, the available pages will appear.  When you 
                come to the desired page number, select it.  The program will
                then load this page to your screen. If this is only a one 
                page document, selecting this option will do nothing.



If the document queue is in your way, hit the F6 key on the keyboard to take 
the queue away.  You can now use your drawing tools within this area.  
However, you will not be able to scroll or change pages until you bring the 
queue back.  To bring it back, you must hit the F6 key once again.




                                FUNCTION KEYS

 F1 - If you are connected to a remote site, this will toggle between off-line 
      and on-line.  If you are on-line, you will go off-line, and if you are 
      off-line, you will go on-line.  A message will appear on the screen with 
      the word "On-Line" or "Off- Line", depending on which state the modem is 
      in currently.  (See the Call Status portion of the Communications section 
      for an understanding of on-line and off-line.)

 F2 - This will clear your screen to the current background color.  If you 
      are connected to a remote site, this will clear their screen to their 
      background color.

 F3 - If you are connected to a remote site, this will send your screen to 
      the remote's screen.

 F4 - This will fax your screen, current page of a .FAX or .PCX file, or the 
      entire .FAX or .PCX file.  (See part 3: Fax Screen in the Fax Menu 
      section.)

 F5 - Allows you to save the screen to a filename of your choice.  The 
      maximum number of characters in the filename is eight.  The filename 
      will automatically become a .PCX image, so you do not need to add an 
      extension.  This is quicker than accessing the save option under the 
      Files menu.  A window will appear and wait for the file name to be 
      typed.  When you are finished, hit the <Enter> key and the screen will 
      be saved to the file name you just typed.  If you do not wish to save
      the screen after hitting the F4 key, deselect it.

 F6 - This will toggle the document queue.  If the queue is displayed, this 
      will take it away.  If it is not displayed, it will display it.  This 
      is a useful feature, when the queue is covering something you wish to 
      discuss, or when you wish to draw within the area occupied by the queue.

 F7 - This is allows the user to change his/her drawing tool by the keyboard.  
      It is the same action as deselecting with the pointing device while in 
      the drawing space.

 F8 - Provides the user with a quick way to change the attributes of the 
      currently chosen tool.  Hitting F7 will bring up the attribute menu for 
      the current tool.  This saves the user the time of going through the 
      main menu.

F10 - This will bring up the information screen.  It contains the version 
      number and revision number of the program, as well as the serial number.  
      It also contains Serial Solutions' address and phone number.  This is 
      valuable for registration information.

                           


                           BEGINNING THE PROGRAM

To start the program, type "PCBBVGA" at the DOS prompt.
                  EG:  D>PCBBVGA

When you start the program, a window will appear with information in it.  It 
contains the program version as well as information concerning peripheral 
devices.  It will indicate if a mouse is installed, whether a tablet is 
installed, the kind of graphic card you have, the type of modem being 
installed if one exists, and if there was any expanded memory found.  You may 
want to keep an eye on these as they are displayed to confirm that everything 
you want installed is installed.




                               TROUBLE SHOOTING

Mouse: First, if it does not install, make sure you install the mouse driver 
       for the correct com port from DOS.  Second, make sure the mouse is 
       connected to the PC, and that it does not conflict with any device.  
       That is, make sure you have not assigned another device to the same 
       com port.

Tablet: If it does not install, make sure it is turned on.  Second, make sure 
        it is connected to the PC.  Third, check the configuration screen to 
        make sure it is setup for the correct com port.  If it is not, follow 
        the steps outlined in the configuration section to re-install it.

Modem: If it is not found, make sure it is turned on.  Second, make sure it is 
       connected to the PC at the correct com port.  Third, make sure your 
       modem can handle the baud rate for which you are attempting to use it.




                               ERROR MESSAGES

There are 38 possible errors that can occur while in the "PC Blackboard VGA" 
program.

Error 1:  "Board Detected not supported" 
          This error occurs at the beginning of the program when a card is 
          detected that cannot be set to the mode that this program requires.  
          If this error occurs, the program will exit to DOS.  Generally, this 
          would mean you have a faulty graphics card, or you are attempting to 
          use a monochrome card.

Error 2:  "Tool File Corrupted - Using Default" 
          This error occurs at the beginning of the program when the program 
          attempts to read the tool file.  The tool file holds the previously 
          set attributes for all the tools, as well as the communication and 
          tablet parameters.  When this error occurs, the tool attributes, the 
          communication parameters, and the tablet parameters will be set to 
          their default values.

Error 3:  "Unable to Create Tool File" 
          This error occurs when exiting from the program. If this error 
          occurs, it means that the program was unable to create a tool file.  
          Thus, any changes made to the tool attributes, communication 
          parameters, and tablet parameters will not be saved.  Therefore, 
          they will take on their default values the next time you enter the 
          "PC Blackboard VGA" program.

Error 4:  "Not Enough Memory For Data Allocation" 
          This error occurs when the program cannot allocate memory for 
          internal buffers that will be used for reading and writing to disk.
          
Error 5:  "Not Enough Memory For Menu Allocation" 
          This error occurs when the program cannot allocate memory for a 
          menu which is to be displayed to the screen.

Error 6:  "Error Saving Tool File" 
          This error is similar to Error 3, except that the file was created, 
          but the Tool file could not be addressed.  Again, since the 
          attributes and parameters could not be saved, the tool attributes, 
          communication parameters, and tablet parameters, will take on their 
          default values.

Error 7:  "Time-Out Error" 
          This error occurs when sending or receiving a file or screen.  If 
          data is not received in a time determined by the baud rate being 
          used, this error will occur.  It means that the data was not sent 
          or received in its entirety.  If this error occurs, attempt to 
          re-send.  It may have been a problem in the telephone line.  If the 
          error persists, you should try two things.  First, disconnect the 
          call, and attempt the call again.  This should clear up any 
          problems that may have been occurring with the telephone line or 
          com port.  Or second, verify that both sites are setup at the same 
          baud rate.  If  you are not, the time-out value will not be correct 
          for the actual baud rate.  The one with the highest baud rate will 
          time-out to early.

Error 8:  "Unable To Open File" 
          This error occurs when the "PC Blackboard VGA" program attempts to 
          load a file to the screen, but is unable.  If this error occurs, 
          attempt to reload it.  If it continues to fail, the file is likely 
          to be corrupted.

Error 9:  "Invalid Response Code" 
          This error occurs when a file or screen is being sent to a remote 
          site.  It means an error has occurred in transmission.  You should 
          attempt to re-send the file or screen.

Error 10: "Unable To Read From File" 
          This error occurs when the "PC Blackboard VGA" program is unable 
          to read a file from disk.  If this error occurs, attempt to reload 
          it.  If it continues to fail, the file is likely to be corrupted.

Error 12: "Unable To Write To File" 
          This error occurs when attempting to write to disk If this error 
          occurs, attempt to re-save the screen.  If it continues to fail, 
          you may want to check your hard drive or floppy disk to make sure 
          enough memory exists to save the image.

Error 13: "Graphic Card Does Not Handle This Image" 
          This error occurs when the program attempts to load a .PCX image 
          which is too complex for the mode being utilized.

Error 14: "Invalid File or Path" 
          This error occurs when the user attempts to change his/her current 
          directory to a directory that does not exist.

Error 15: "Unable to Rename File" 
          This error occurs when you attempt to rename a .FAX to a new name 
          of your choice, and the PC is unable to perform this action.  You 
          may be using illegal characters, so try to rename it again.

Error 16: "Unable to Delete File" 
          This error occurs when the PC is unable to delete the file you have 
          selected to be deleted from the File Menu.

Error 17: "Not a Valid PCX Image" 
          The .PCX image that you are attempting to load is not in the correct 
          .PCX format.

Error 18: "Fax Response Error" 
          This will occur during the "handshake" between the fax board and a 
          fax machine.  It means that an invalid response was given, which 
          means an error has occurred between the two devices. Transmission 
          will either not take place, or cease to continue.  You should try 
          the action again.

Error 19: "User Aborted Transmission" 
          This error occurs when the user aborted the transmission of a file 
          or screen.  This occurs when the sender of the data hits the <ESC> 
          key during transmission.

Error 20: "Fax Board Not Installed" 
          This will occur when the user tries to fax an image or file, and 
          the fax board has not been selected as your communication device in 
          the Configuration Menu.  You should change your device type.

Error 21: "Unable to Continue, Already On-Line" 
          This error occurs when the user attempts to "Connect" in the 
          Communication Menu, when he/she is already connected, or if you 
          attempt to change parameters in the configuration menu.

Error 22: "Unable to Continue, Not On-Line" 
          This occurs when the user is trying to access send screen and/or 
          send file when not on-line.

Error 23: "No Modem Defined" 
          This error will occur in the Configuration Menu if you attempt to 
          change a communication parameter and a communication device has not 
          been chosen.  This error will also occur if the user attempts to 
          enter the Communication Menu when no communication device has been 
          chosen in the Configuration Menu.

Error 24: "Fax Board Cannot Utilize This Menu" 
          This error will occur if you attempt to enter the Communication 
          Menu when your communications device is "Fax Board".  This is to 
          inform the user that the "Fax Board" does not use this menu option.

Error 26: "Drive Not Ready" 
          This error will occur if you attempt to change your drive to a 
          floppy drive that is not ready;  that is, if there is either no 
          disk in the drive, or the drive door is open on a 5 1/4 floppy 
          drive.  You should check the drive, and try again.

Error 28: "Not Connected To Another PC" 
          This error occurs when the user tries to toggle between On-Line and 
          Off-Line when he/she is not connected to another PC.

Error 29: "User Aborted The Receiving of Data" 
          This error occurs when the receiver of data from another PC has hit 
          the <ESC> key to abort the reception of data.  This is mostly to 
          tell the user that he/she was successful in aborting the receiving 
          of data.

Error 30: "Not Enough Disk Memory For Undo" 
          This error occurs when the directory you are working in does not 
          have enough disk space to hold the "Undo" file.

Error 31: "User Aborted The Printing of Data"  
          This occurs when the user hits the <ESC> key while printing an 
          image.  If the user accidently hit the <ESC> key, he/she will need 
          to print the image again.

Error 32: "Document Queue Does Not Exist" 
          This error occurs if the user attempts to use the F6 key when a 
          document has not been loaded.  This is not a serious error, but 
          more of an information message.

Error 33: "Printer Error - Not Connected or Not On" 
          This error will occur if the user attempts to enter the Print Menu 
          when either the printer is not connected or not on.  The user 
          should check the cable, make sure the printer is on, and finally, 
          make sure the printer is on-line.

Error 34: "No Tablet Defined" 
          This error occurs if the user tries to change an option within the 
          Tablet Setup when a tablet size has not been specified.  The user 
          should select a tablet size at this time.

Error 35: "No Address is Assigned" 
          This error will occur if the user tries to install either a modem 
          or tablet when an address value of zero has been selected.  The 
          user must select a valid address before installing the modem or 
          tablet.

Error 36: "No Interrupt Number is Assigned" 
          This error will occur if the user tries to install either a modem 
          or tablet when an interrupt number  of zero has been selected.  The 
          user must select a valid interrupt number before installing the 
          modem or tablet.

Error 37: "Unable to Access EMS"
          This error occurs when the PC attempts to Read or Write to EMS, but 
          is unable to.

Error 38: "Erase Has No Attributes"
          This error occurs if you try to access the attribute menu while the 
          erase tool is chosen.  This is due to the fact that erase has no 
          user definable attributes.  If you had previously saved the image 
          with the annotation, you will not be able to erase those 
          annotations.  Therefore, you may only erase annotation marks since 
          the last save.

