Printronix ThermaLine Series Programmer's Reference Manual page 91

Example The following example is a vertical duplication of one horizontal line. The
line is duplicated three times. To illustrate positioning, the starting row and
column are indicated on the example but do not necessarily reflect actual
location on the page.
VDUP;3;2
HORZ
1;52;15;65
STOP
VDUP;OFF
COLUMN 15
ROW 52
ROW 54
ROW 56
Commands
(3 duplications with 2–character row spacing)
(Command to duplicate vertically)
(Stops the command to duplicate element)
(Terminates the vertical duplication)
COLUMN 65
vdup.ex
4–47