To Mask Underlying Objects With AEC Polygons

Use this procedure to change an AEC polygon style to mask a background. This style property also determines if masking break marks display correctly in your drawings.

1. Select an AEC polygon.
2. Click AEC Polygon ribbon contextual tab General panel Edit Style drop-down Edit Style .
3. In the AEC Polygon Style Properties dialog box, Other tab, select the Use Background Mask check box and click OK.

   All AEC polygons of this style use a background mask in the current drawing.