Chapter 2 Graphics Tutorial
2-4
Figure 2. 2. Result of Draw Commands: Zero-relative Lines
The first two lines switch the printing system to the PRESCRIBE mode, reset printing
system parameters, and set the line width to 0.01 inch. On the third line, the MZP (Move
to Zero-relative Position) differs from the MAP (Move to Absolute Position) command
in one respect: the position specified is in relation to the top and left edge page limits of
the page, rather than in relation to the top and left page margins. MZP moves the cursor
to the point that is 0.5 inches from the left edge limit and 1 inch from the top edge limit.
Similarly, on the next line, DZP (Draw to Zero-relative Position) draws a line from the
starting position to the point 2 inches from the left edge limit and 0.5 inches from the top
edge limit.
Relative Lines
Another way to specify positions is in relation to the current cursor position. The follow-
ing command sequence provides an example.
!R! RES;
SPD 0.01;
MRP 2, 1;
DRP -1.5, -1;
MRP 2, 1;
DRP -1.5, -1;
MRP 2, 1;
DRP -1.5, -1;
PAGE;
EXIT;
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