F - Set Present Speed; M - Select Mirror Mode; P - Set Label Backup Speed; W - Wait Mode (Prodigy Only) - Printronix SL4M Programmer's Reference Manual

f - Set Present Speed

(Not supported.)

M - Select Mirror Mode

This command instructs the printer to "mirror" all subsequent print field
records. This command toggles the mirroring mode. Mirrored fields are
transposed visually, as if the object is viewed in a Printed Result. (Not
supported.)

p - Set Label Backup Speed

This command is used for the "Peel and Present" and "Cut Label Operations".
It allows the user to specify the rate at which the printer will reverse the label
direction to align the next start of print position. The rate set by this command
remains in effect until another backup speed command is received, see
Appendix L for valid ranges. The speed is modified via the menu or when the
printer is reset. (Not supported.)

W - Wait mode (Prodigy only)

(Obsolete System Command.)

Z - Zip Mode (Prodigy only)

(Obsolete System Command.)

Print Area

When looking at the front of the printer, the origin of the label is positioned at
the bottom left of the label, and extends up and to the right. The label length
for continuous labels can be set in the Menu and through the <STX>cnnnn
command.
On Datamax printers, the print width is adjusted through the menu 'LABEL
WIDTH'. According to the manual, objects extending beyond the page width
will not print. However, this does not seem to have any effect on the I-42xx:
the full width can always be used. On DGL, objects draw beyond the adjusted
page width will not print.
Physical page-rotation is not available on Datamax. When rotation is needed,
each object should be rotated individually.
See figure below for a graphical representation of the print area, and the
coordinate system used by DGL.
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