When you want to obscure or hide some part of a project view, add a masking region.
- Click Annotate tab
Detail panel
Region drop-down
(Masking Region).
- Click Modify | Create Filled Region Boundary tab
Line Style panel, and select the boundary line style from the Line Styles drop-down list.
- Sketch the masking region (or regions).
Masking region sketches must be closed loops.
- When finished, click Finish Edit Mode.
After you add a masking region, you can sort the draw order.
