Printronix ThermaLine Series - Manual (Page 131)

4–87 Commands
EC Defines the ending column of the reverse print field.
Enter a value ranging from column 2 through the last
column of the form. The ending column must be
greater than the starting column. Character column or
dot column is specified based on the Scale command
(page 4–88), or use the CP.DP format (page 4–7).
STOP Stop indicates the end of the REVERSE command;
enter STOP, and the IGP/PGL will wait for a new
command. If not entered, the IGP/PGL will expect
another set of Reverse Print command parameters.
Comments You can use reverse print with all form elements (alpha, lines, boxes, etc.).
The IGP/PGL can also reverse print bar codes, but reverse printed bar
codes are unreadable by bar code scanning devices.