Example - HP PCL 5 Reference Manual

Note
If a proportional-spaced scalable font is selected using an ID number,
send the Height command to specify the point size otherwise, the size
is determined by the height characteristic value of the former
font (as listed in the font select table) See "Font Selection by
ID Command" later in this chapter for more information.

Example

To specify a height of 12 points for the primary font, send:
To specify a height of 14.4 points for the secondary font, send:
If the above sequence was used for selection of a scalable font, the
actual font would be scaled to 14.5 points.
EN
E
(s12V
C
E
)s14.4V
C
Height Command 8-13