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4–59Commands
Execute Form: Overlay Data
Overlay data is variable alphanumeric data entered onto a predefined form.
The form is completed by positioning the data in the exact location it will
appear on the form when printed. The data is placed horizontally using tabs
and spaces, and vertically using line feeds, form feeds, and the EVFU.
For example, if the serial number field on the form begins at character row
22, and column 14, enter 22 line feeds, space over 14 columns, and input
serial number overlay data. An entire form can be completed with a page of
overlay data in this manner. Overlay data at the end of a form is printed on a
new form until all overlay data is used. Then, to advance to the next form,
use a form feed.
The IGP/PGL Electronic Vertical Format Unit can be used to control vertical
spacing of the overlay data. In place of line feed commands input
individually, the EVFU can be programmed (during the Execute Form mode)
to slew the overlay data page to the predetermined lines with a single
command.
NOTE: When using the PGL, the Dynamic Data command and Overlay
IGP/PGL commands may be issued on the same line as the overlay
text to synchronize the printer with systems that count lines (e.g.,
IBM). See the IGP/PGL command standard for inline command
format on page 4–3.