Autoblank

You can use autoblanking to remove an area of graphics from a drawing and leave a clear area. Generally, subsequently added graphics are drawn in this clear area. The main purpose is to display annotations 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 display. Overlapping 2D, text and other annotation graphics are not hidden by blanking.

Autoblanking can be used for annotation elements: LDIM, ADIM, RDIM, PDIM, GLAB, SLAB, VNOT, and NOTE. The attribute BLNK specifies whether autoblanking is required, and attribute BMAR specifies the blanking margin to be applied.

BLNK  TRUE/FALSE

BMAR  value

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 is drawn with no blanking margin.