HP L 5 manual

If the currently selected pen is outside the range of the new palette size, the SP command modulo function is applied to obtain a pen number which will index into the new palette; this clears the current residue (the unused portion of a pattern) and terminates any sequence of continuous vectors. For more information, see the descriptions of the Line Attribute (LA) and Line Type (LT) commands in the PCL 5 Printer Language Technical Reference Manual.

The number of pens is defaulted by an IN command.

This command is ignored if the current palette was created by the Simple Color command (?*r#U) or ?E.

7-18 Color Vector Graphics (HP-GL/2) EN