# Category : Printer + Display Graphics

Archive : GRAPHIT2.ZIP

Filename : GRAPHIT2.HLP

Whenever you change the scale to look at a graph in greater detail or from

farther back, or you shift the range of the axes so that the graph you just

drew will be centered, the screen must be cleared so that a new coordinate

grid can be drawn. So you're left with the viewing angle you wanted for that

graph, but the screen is blank. You shouldn't have to solve this problem by

retyping the whole equation again...and you don't. You can redraw the equation

much more easily by selecting "Last graph" in the "Redraw" menu. But with

AutoRedraw ON, you don't even have to do that.

As its name suggests, AutoRedraw will redraw the last equation you typed

in automatically when you change the scale or range. If you don't want a graph

redrawn, you can abort it by pressing ESC twice and you will be returned to

the menu. If you want to turn off AutoRedraw completely (say you'd rather

redraw all of the equations in the redraw queue instead of just the last

one...with AutoRedraw on you'd have to wait for the last equation to be

graphed twice, once by each function), just select "AutoToggle" under the

"Redraw" menu and answer "n" when asked if you want AutoRedraw on.

AutoRedraw is ON by default. You can change the default to OFF by using

the "/A" command line option (see GRAPHIT.DOC, Appendix A for a full

explanation of the command line arguments).

Press PgDn for more help on the Redraw Queue.

THE REDRAW QUEUE

Every time you type in an equation, the character string you typed and the

program's internal representation of that equation get stored in the redraw

queue. From this queue, or list, you can call up any of the last 20 equations

you typed to graph again with fewer keystrokes than retyping it. Or you can

redraw all of them or the just the last one you typed with even fewer

keystrokes. The equations in the queue are stored in an order that puts the

most-recently-used at the beginning and the least-recently-used at the end.

Hopefully, when the queue fills up, the equations that are bumped off the

queue at the end will be the ones you won't miss very much.

As explained in the previous sub-section, the screen clears whenever you

execute Range or a successful Scale (if you abort Scale the screen remains as

it was). If you execute either of these functions or clear the screen

accidentally with the Clear menu option, you can redraw the last equation (if

AutoRedraw hasn't already) by selecting "Last graph" under "Redraw", or you

can redraw all of the equations in the queue using "Redraw All" under the

"Redraw" menu. Note that the redraw function does not keep track of which

graphs are on the screen at any point in time so "redrawing all" may put more

(if you plotted many equations on the screen before the last one) or fewer (if

you cleared the queue) equations on the screen than there were before the

screen was cleared. Press PgDn for more help.

USING "PICK GRAPH"

The "Pick graph" option in the Redraw menu allows you to graph any of the

equations currently in the redraw queue. Because of the enormity of the buffer

that would be required to "remember" what was on the screen "behind" a list of

all the equations in the queue so the images there could be preserved in EGA

and VGA modes, the equation-viewing is limited to one at a time in a pop-up

box. If you would like to redraw the one shown, press enter. Or, if you have a

mouse, click the left button on the equation itself. If you want to look at

more, press any other key except Escape (or click on any point on the screen

outside of the box with the equation in it). When you have looked at all of

the equations in the queue, it recycles to the first equation again. If the

equations start looking familiar, you've probably reached the beginning again.

If you decide you don't want to redraw any of the equations presented for your

perusal, press Escape (or click the right mouse button) and the command will

be ignored. When you pick a graph, it is reinserted at the top of the redraw

queue, as you'll likely be working with it again in the future. So if you

scale the grid again, that graph will be Auto-Redrawn, and if you redraw the

last graph, that graph will be shown.

ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄEnd of Redraw help. Press ESC to return to menu.ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/