HP PCL 5 Comparison Manual page 102

The Segment Size field, which is part of each segment
within the Segmented Font Data, was changed from an
unsigned integer in Format 15 to an unsigned long integer
32
in Format 16. This allows segments to be up to 2 – 1 bytes
long.
Font Header Format 15 is described in more detail in the
PCL 5 Printer Language Technical Reference Manual in the
"Soft Font Creation" chapter.
Format 16 supports new segments and new values for the
Font Type and Font Scaling Technology fields. New
segments which are specific to large TrueType fonts are
described in this chapter in the section titled "HP LaserJet
4PJ printer." (This information will included be in future
versions of the PCL 5 Printer Language Technical Reference
Manual.) The new segments and values which are specific
to bitmap fonts are described below.
Header Format
The Header Format byte identifies the font header format.
For large fonts, this field should be set to 16. Note that
Format 15 does not support bitmap fonts.
Scale Factor
For bitmap fonts, set this field to 0.
Master Underline Position
For bitmap fonts, set this field to 0.
Master Underline Thickness
For bitmap fonts, set this field to 0.
Font Scaling Technology
For bitmap fonts, set this field to 254.
Variety
For bitmap fonts, set this field to 0.
2-66 Printer-Specific Differences