2-7
Figure 2. 5. An Example of a Box
Line 1 places the printing system in the PRESCRIBE mode and resets printing system
parameters. The UNIT C; command on the second line sets the unit of measurement to
centimeters, and the SPD (Set Pen Diameter) command on line 3 sets the line width to
0.1 centimeters. (If you omit these two commands, the printing system will print using
the default unit, inches; and the default line width, 3 dots.)
Next, the MZP command on line four moves the cursor to the point that is 3 centimeters
to the right of the left edge limit and 3 centimeters below the top edge limit. This is the
starting point from which the box is drawn.
On line 5, BOX 3, 4; draws a box with a width of 3 centimeters and a height of 4 centi-
meters.
The position of the box with respect to the cursor depends on the positive or negative
value specified for width and height. The box is drawn to the right of the cursor if width
is positive, and to the left of the cursor if width is negative. Similarly, the box is drawn
below the cursor if height is positive, and above the cursor if height is negative. This
relation is illustrated in the figure that follows.
By default, the position of the cursor is not affected by this command. However, you can
also specify an option parameter to make the cursor move to an adjacent or diagonally
opposite corner of the box, down by one text line, or to the left margin on the next text
line. The following figure shows some examples.
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