			       USING AutoRedraw

    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.


───────────────End of Redraw help. Press ESC to return to menu.───────────────

