Lexmark 302 - Manual (Page 22)

You can set line spacing to the following lines per inch (LPI) from the
operator panel. LPI represents the number of lines to be printed per
vertical inch.
6
8.
For more information, see “Using Print Format and Quality
Parameters” in
IBM 4232 Printer Model 302 Operator Panel
Instructions or “Introducing the 4232 Printer Model 302” in IBM 4232
Printer Model 302 Product and Programming Description.
xx User’s Guide Model 302