Chapter 1 Introduction to PRESCRIBE
1-4
Format of PRESCRIBE Commands
The basic format of a PRESCRIBE command is:
• • • or • • • • (command name) parameter, ..., parameter;
The command names generally consist of three or four letters. In most commands, the
parameters must be followed by commas. The last parameter is always followed by a
semicolon. Some commands (RES, for example) have no parameters. In this case, the
command should be followed immediately by a semicolon (RES;).
The length of a single PRESCRIBE command is limited to 255 characters, from the first
letter of the command name through the final semicolon. Commands longer than 255
characters are not executed.
Spaces, carriage return codes, and line feed codes are generally ignored in PRESCRIBE
command sequences. These characters are not generally counted in the command length.
(Exception: Spaces are not ignored in quoted character strings.) To improve readability,
place at least one space before each command or place each command on a separate line.
Basic Concepts
This section discusses a few basic concepts concerning how the printing system prints on
the page. These concepts are:
• Edge limits
• Margins
• Coordinate systems
• Text positioning/Character spacing
•Paths
• Logical page and physical page
• Page orientation and direction
Edge Limits
The printing system cannot place print on the outside edges of the paper. The edge limits
to which printing is possible are located 5 mm inside the edges of the paper; or 6 mm
(5mm in landscape orientation) from the left edge and 4 mm from the top of the paper in
HP LaserJet emulation. Refer to the figure Edge Limits and Margins on page 5.
The edge limits adjust automatically to the size of the paper cassette (although not to the
size of manually fed paper). The edge limits can also be set to various standard sizes by
the SPSZ (set paper size) command, or by the equivalent HP LaserJet commands. In HP
LaserJet emulation, the edge limits slightly vary according to the page orientation (as
also shown in Edge Limits and Margins on page 5).
Margins
The top and left margins are set in centimeters or inches in relation to the top and left
edge limits of the page. The bottom and right margins can also be set as a distance from
the top and left edge limits, or they can be set in terms of page width, page length, or
lines per page.
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General
Weight and Dimensions
