Add, remove or change background masks on a selection set of annotation objects. It currently supports DIMENSION, INSERT, MULTILEADER, and MTEXT objects.
Keyboard Command: AnnBakMsk

Procedure:
- Choose a selection set of annotation objects.
- Choose the desired settings.
- Click to begin processing.
Notes:
- The border offset factor does not apply to dimension objects.
- The only attributes that qualify on inserts are those that have been designated at multiline during block design.
- Multiline attributes are not supported in AutoCAD 2007-2009, BricsCAD v12 and ZWCAD 2014.