HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

23-14 The Character Group EN
Figure 23-7 Stick Font Character Cell
When you use the SI (Absolute Character Size) or SR (Relative
Character Size) commands to change the size of the characters,
or use the ES (Extra Space) command to add extra space around
them, you alter the size of the CP (Character Plot) cell.
You can control almost all aspects of the label’s appearance: its
position, size, slant, spacing, and direction. This chapter explains
the commands that control these features. This chapter also tells
you how to select fonts other than the default font.