The group's first and last categories.
Space inside the box around the text, in the text's own direction.
The distance between the label's lines, in px.
The element's box.
OptionalrotationThe text's angle in degrees counterclockwise, about the box's center: 90 reads up, as an axis title up a side does. Absent for level text.
The label of a group of categories, centered on the group: level along the bottom or top, turned to read up beside a vertical axis. Its lines are joined by
\n.