HP L5 manual Structure of the Vertical Rotation Segment is

The structure of the Vertical Rotation Segment is:

Byte	15 (MSB)	8	7	(LSB) 0	Byte
0	VR (22098)				1
2	Data Segment Size (4) *				3
4					5
6	Format (0)				7
8	Descender value				9

*This segment is for Font Format 16. The Data Segment Size field for Font Format 16 fonts is 4 bytes; the segment for Font Format 15 fonts is identical except the Data Segment Size field is 2 bytes instead.

Format (UINT16)—Set this value to 0.

Descender Value (SINT16)—Set this value to equal the “sTypoDescender” value from the “OS/2” table of the TrueType font.

2-46 Printer-Specific Differences