F1  Program and Drawing Modification
<r>-allows rotation about a point in the plane of the screen. First select
    center of rotation, next define object. Follow prompts. Rotation can be
    stopped short of the full number of steps by selecting <Esc>.
    *C*-<r> will rotate only the current color as selected by F8. Use <Alt-r>
    to rotate all three colors of an object. 
<a>-again-allows the same object to be rotated again with a new angle. 
<R>-revolves an object about a horizontal or vertical axis. Use like <r> by
    marking axis center, and any two opposite corners. 
<Ctrl-r>-rotates left half of screen 90 degrees.
<z>-zooms an object either up or down. Does not change drawing scale. Use like
    <r> by marking center, and any two opposite corners.
    *C*-will zoom only current color as selected by F8. Use <Alt-r> to zoom
    entire object. 
<Z>-zooms the entire screen up or down, changing scaling accordingly.
<m>-mirrors image of an object defined in box. Select mirror line orientation.
<M>-mirrors entire screen either horizontally or vertically. 
<F>-flips/rotates full screen through desired view angle. 
<v>-reverse video. 
<g>-grid, can be used to remove grid by first selecting F8-dark. *C*-<0> 
<c>-removes correction check normally occuring after each function. Selecting
    <c> again returns error check. 
<n>-exits function.

F2  Draws a Box.
<d>-display-displays box as cursor is moved
<s>-produces shaded box with choice of light, medium, and heavy shade
    Use F8 to set color. Mark TLC and BRC
<D>-same as <d> only box is copied for use with F7 animate, move, etc.
<S>-same as <s> only box is copied for use with F7 animate, move, etc.
<n>-exits box drawing.

F3  Draws a circle, ellipse, or arc.
<c>-circle-draws a full circle. The location of the cursor when <c> is selected
    will be the center of the circle. After marking the center, move the cursor
    to the desired radius. The length of the radius is shown on the prompt line
    and the circle is displayed. The center can be shifted with the numeric keys
    corresponding to the cursor keys. Select F3 again to mark the radius and
    draw the circle. If circle is not of desired roundness, select <$> and
    change screen aspect ratio.
<a>-arc-draws an arc using cursor position as start and end. As with the
    circle, the current cursor position is the center of the arc. The second
    position is the radius and one end of the arc. The third position is the
    other end of the arc. Arcs are always drawn counterclockwise.
<e>-ellipse-draws a full ellipse. Use as with circle, but use up and right
    arrow to properly shape ellipse before hitting a return.
<n>-exits function
While in the CURSOR MODE, selecting <C> exchanges the present cursor position
with the last center of a circle, arc, or ellipse. 

F4  Shades area
<l>-lightly shades enclosed area
<m>-medium shading of enclosed area
<d>-dark/heavy shading of enclosed area
    Use F8 to determine color of shading
<s>-Spray paints area. Use on painted circle to give a 3-D effect. Effects
    active color only. First draw item and paint with F5. Current cursor
    location sets the position of light source (generally on the object).
    Next mark any corner of box containing object and select F4 again.
    Mark opposite corner of box and select F4 to spray paint.
<Alt-s>-as above but effects all colors.
Set screen aspect ratio to 0 to shade columns.
To stop shading while in process type <Esc>.
<n>-exits to cursor mode

F5  Paints the area enclosing the cursor
Both paint until reaching boundary with same attribute.
Gaps will cause the paint to leak out.
<l>-light (on)
<d>-dark (off)
<c>-selects color palette
<C>-selects background
<n>-exits to cursor mode

*C* -The medium resolution portion also allows the following.
<p>-paint-as above, paints the enclosed area with the specified fill color. You
    must also specify the border color by number.
<b>-background-sets the color of the entire screen. 16 colors are available.
                    0-Black                 8-Dark Gray
                    1-Blue                  9-Light Blue
                    2-Green                10-Light Green
                    3-Cyan                 11-Light Cyan
                    4-Red                  12-Light Red
                    5-Magenta              13-Light Magenta
                    6-Brown                14-Yellow
                    7-Light Gray           15-White
Select the color of the background by using the <Space Bar>. Fix the color with
a return.
<c>-color-sets the active color palette.
<C>-selects unichrome palette (<b> sets unichrome color)
<m>-modifies color set with F8 to one of 16 color combinations

F6  Draws lines and adds text
Note: move cursor to desired position before using F6. Use <n> to
      exit if cursor not in correct position.
<d>-dot-places dot at cursor location
    A RETURN will mark dot
<l>-line-connects cursor points with a line. A RETURN will mark next point and
    continue drawing. All points must be marked with a RETURN or they will not
    be saved. Select F6 a second time and <e> or <E> to end line drawing.
<c>-cursor-draws continuous lines as the cursor is moved.
<t>-text-enters text at cursor location.
<p>-parallel-draws parallel lines.
<s>-spoke-draws lines from common center point.
<a>-arrow-places arrow head at cursor location either pointing up,down,left, or
    right. Use u or d to upsize or downsize the arrow
<e>-exit-ends current mode. Required after any of the above except text and
    arrow.
<E>-ends current mode and saves line drawing to disk using user specified name.
    These are saved as vectors and are ideal for commonly used symbols.
<o>-old line drawing from disk. A single drive letter will display appropriate
    files on disk. Must specify rotation angle(any angle) and scale factor. A
    RETURN will display drawing at rotation and scale it was created.
<O>-old, last drawing selected from disk. Allows alternate rotation and scale.
<n>-exits function.

F7  Erases, copies, animates, moves, smears, or replicates an area
Mark any two corners of object to be erased or copied with cursor.
<e>-erases the enclosed area and copies it for use with a,s,r, and m.
<Alt-e>-erases enclosed area but does not copy it. Use to erase small areas.
<c>-copies area to be moved, but does not erase
<C>-copies the portion of the screen to disk for later use. No extension on the
    user supplied name creates a file that can be retrieved with F7 <o>. A .PIC
    extension saves portion of screen for later use and is compatible with
    other graphics programs. A .BAS extension will save the screen as a basic
    subroutine for use in user written programs.
<Ctrl-c>-copies the same size object as previously copied without remarking.
<o>-retrieves drawings saved with <C>. A single drive letter will display
    appropriate files on disk.
<a>-animate allows a previously copied or erased area to be moved around the
    screen with the cursor. As the object is moved vertically off the screen it
    will slowly disappear until the cursor wraps. As the object is moved
    horizontally off the screen it will distort until wrapping occurs.
<m>,<M>, <Ctrl-m> and <Alt-m>-move area previously erased or copied to lower
    right of cursor, each with a different syntax. (different result)
<s>,<S>, <Ctrl-s> and <Alt-s>-smear the copied object with each step of the
    cursor using different syntax. Use this as a paint brush. Copied size
    determine number of bristles in brush.
<r>,<R>, <Ctrl-r> and <Alt-r>-replicates object with each cursor step.
<n>-returns to CURSOR MODE.
Note that when a very large or complex object is rotated or zoomed using F1,
the last copied area maybe lost. It is possible to copy the entire screen. This
allows two different drawings to be merged. 

The last screen copied or erased can be view and further manipulated by
selecting <Ctrl-End> <Ctrl-PgDn>.

F10  Directory, saves, retrieves an old drawing, starts fresh, or exits.
<d>-directory of selected disk
<s>-saves the current drawing - must be room on disk. For best results save
    drawings on B:. Two files will be saved. The first is the screen file
    designated automatically as yourfile.scn. The second is the data file for
    scale information.
<o>-old-retrieves a stored drawing from disk
    Screens previously created with this program should have an associated data
    file with scale information.
<t>-template-allows a template screen to be called up. Disables updating of
    disk.
<f>-fresh-clears screen and starts again. If the current drawing has not been
    saved on disk it will be lost.
<p>-prints graphics screen on line printer #1
    The last screen title is displayed and you are asked if it is OK.
    <y>-yes will print the title with the screen.
    <n>-no  allows you to enter a new title on the prompt line.
<w>-restores old workspace #1 to any screen or screen position.
<W>-restores old workspace #2 to any screen or screen position.
<k>-kills a file on the disk. User must specify full name including drive.
<e>-exits program and returns to main menu.
<E>-exits program completely and returns to DOS.
<Ctrl-e>-switches to other program. (Either DRAW or ZPRINTER)
<n>-exits function.

F3-Printer configuration for zoom printing.
<r>-reviews printer configuration
<s>-selects printer for use in printing zoom graphics
<a>-adds a user specified printer configuration
If your printer doesn't support a given pitch answer the corresponding
prompts for character code and line step with a RETURN.
<n>-exits function

F4-Prints graphics screen to printer
<z>-zoom prints partial screen. Enclose area to be printed in box.
<Z>-Zoom prints entire screen.
With partial and full screen zoom printing you must specify the characters to
use and one of three sizes.(1 is the smallest and 3 is the largest)
<p>-sets up for screen dump or single sheet printing on Okidata 92.
    To print on Okidata select <o> when asked to "Print Screen (y/n)?"
<n>-exits to cursor mode
The zoom printing can be set up to work with almost any printer, while the
single sheet print is currently limited to an Epson (with a screen dump) or an
Okidata 92.
help4b
Print sizes range from 1 to 41
Size 1 corresponds to 17 cpi
Size 2 corresponds to 12 cpi
Size 3 corresponds to 10 cpi
Some printers do not support all three character pitches and will not be
available for use.
Size 4 through 41 are multiples of the first three sizes.
Some experimentation maybe necessary to find the correct size to print with.
To stop printing use Ctrl-<s>.

F5-Calculates area, mass and center of area/mass
<a>-area of object enclosed in box. Use F8 to set color to calculate on.
    Returns area of object and the center of the object.
<A>-area of last object.
<m>-mass of object enclosed in box based on user supplied density parameters
for each color.  Also returns center of mass.
<n>-exits function

F6-Adds text to drawing
Note: move cursor to desired position before using F6. Use <n> to
      exit if cursor not in correct position.
<t>-text-enters text at cursor location.
<n>-exits function.
