1	GRAPHXY
	The X-Y Graphics data editor is designed to allow the user
to create and modify graphics data files.  The file format is a binary,
unformatted, sequential access file.  The first record is a 72 byte header
record.  The first word must be 0 simple X-Y data files. The next 70
bytes are used for a graph title.  Each record (up to 600) following the
first has three elements; an INTEGER*2 element number running from 1
to 600, a real x-value, and a real Y-value.

	The menu prompts for three options, Display, Edit, and Use.
The Display option will display the contents of the current default
graphics data file.  During the display, hitting any key will halt
the scrolling of the data and let you return to the main menu.

	The Edit option allows you to edit data as if you were using a 
spread sheet calculator.  The arrow keys move the block up, down, right,
and left.  Pressing the PF1 key will display the keypad layout.  The
keypad layout is the standard VPW keypad layout with the addition of 
the GOTO, INSERT, DELETE, and TITLE keys.  Additional HELP on the edit
option is available when one is in the EDIT mode.

	The Use option allows you to use another data file.  By 
default the data file used is called GRAPH.DAT unless the calling 
program has passed on a default file name to use.  The Use Option
will display the current default file name.
2	DATA_ENTRY
	Pressing the PF1 Key displays the keypad layout.  Use the
arrow keys to position the highlighted block to the data element you
want to change. Data is not entered until you hit return.  Data for a
new X-Y pair is not permanently entered until both X and Y values are
entered. 

	If the data file is long (so using the arrow keys would be
inconvenient), press GOTO and you will be prompted for a point number
to goto.  If you want to goto the end of the file for adding data,
press GOTO and enter 600 or some large number. You will be positioned
at the first available data entry slot. 

	If you want to insert data, position the cursor over the point
where you wish the new data to be.  Press INSERT and the existing data
will be pushed down on row and you will be able to enter new data.
If you wish to delete data, position the cursor over the point to delete.
Press DELETE and the X-Y data for that point will be deleted and the
following data will be pushed up a row to fill the gap.  Finally,
if you want to enter or change a title for a graph, press TITLE and you
will be prompted for a title.

	The DONE key or ^Z will let you exit from data editing and you
will be prompted for whether or not to update the data file.  The QUIT
key will abort the editing process and leave the original data unchanged.
