1. Click "Valid"
2. Move the mouse pointer on the "AV" button
3. Click the RMB(Right Mouse Button)
4. Select to enable the "Edit Valid Layers" on the pop-up menu
5. input the "prb" on the filter field
6. Click the "v" column using LMB(Left Mouse Buttom) for the prBoundary(drawing/boundary/label)
7. Move the mouse pointer on the "AV" button
8. Click the RMB(Right Mouse Button)
9. Select to disable the "Edit Valid Layers" on the pop-up menu
10. you can select the prBoundary(drawing/bpundary/label) on the LSW
and you can select, draw, or remove the prBoundary(drawing/boundary/label) on the Layout canvas
thanks