Variety (Ub); Or Threshold (Ui); Global Italic Angle (Si); Global Intellifont Data Size (Ui) - HP PCL 5 Reference Manual

Variety (UB)

The interpretation of this field depends on the value of the preceding
(Font Scaling Technology) byte. For TrueType fonts, this field must be
set to zero.

OR Threshold (UI)

Formerly called the "LRE Threshold," this is the pixel size in design
units above which the missing pixel recovery process is switched on
in Intellifont scaling and rasterization.
Note The size of a pixel (in design units) increases as point size and device
resolution decrease.

Global Italic Angle (SI)

The Global Italic Angle field contains the tangent of the italic angle
times 2
fonts. For detailed information on Global Italic Angle, refer to Intellifont
Scalable Typeface Format.

Global Intellifont Data Size (UI)

The Global Intellifont Data Size identifies the size of the Global
Intellifont data block. For detailed information about Global Intellifont
Data Size, refer to Intellifont Scalable Typeface Format.

Global Intellifont Data

For detailed information on Global Intellifont Data refer to Intellifont
Scalable Typeface Format.

Character Complement (Array of UB)

This 8-byte field qualifies the compatibility of a type 10 or 11 font with
various character sets. Each bit is independently interpreted with the
exception of the least significant three bits. (Bit 63 refers to the most
significant bit of the first byte, and bit 0 refers to the least significant bit
of the eighth byte.)
EN
15
(relative to the vertical). Set this field to zero for upright
Font Header Format 11-35