You can use autoblanking to remove an area of graphics from a drawing and leave a clear area. Generally, graphics added later will be drawn in this clear area. The main purpose is to allow annotation to be shown clearly in crowded parts of a drawing. The geometry of the blanked areas is defined by the geometry of the annotation element; for example, a circular annotation element can define a circular blanked area where no 3D design graphics will appear. Overlapping 2D, text and other annotation graphics will not be hidden by blanking.

where value is a real value that is greater than or equal to 0.0. If BMAR is set to 0.0 then a blanked region will be drawn with no blanking margin.