Printronix ProLine 5 Series Manual page 124

Upper Case Select
The Uppercase Select parameter controls how the printer handles lowercase
characters it receives from the host computer. When enabled, all characters will
be printed in uppercase.
DISABLE prints lowercase characters received from the host computer
as lowercase, and uppercase characters received from the computer as
uppercase.
ENABLE prints lowercase characters received from the host computer
as their corresponding uppercase equivalents; uppercase characters
received from the computer are printed as uppercase.
Slew Relative
The Slew Relative feature determines the number of lines slewed (the number of
lines the form is advanced to a preset location) when an EVFU Slew Relative
command is received.
1–16 Lines
1–15 Lines
Configuration Menus 4–71