The following illustration shows how the PCL Typeface List would look.
Vertical Rotation Segment
The Vertical Rotation Segment is used to define the lower boundary of the rotation box used when the character text path direction is set to vertical rotation. This is an optional segment which may be downloaded with Font Format 16 TrueType fonts.
The following illustration shows an example of character rotation. The boxes around each character represent the vertical rotation box. The distance between the baseline and the bottom of the character box is represented by the Descender value in the Vertical Rotation Segment.