Specifies a rotation angle of the label for a node. Allowed angles are 0, 90, 180 and 270 degrees. The rotation is around the centre of the label, after any LABELOFFSET has been applied.

The LABELFONT must be a TrueType font for angles other than 0 (the default) as these are the only font type to support rotating text.

Rotated label, using LABELANGLE 90 and LABELOFFSET E