Has anyone tried anything using masking regions in a titleblock family? It doesn't seem to do anything. I'm trying to create a titleblock for use in revisions/addenda so I can drop it on top a view (basically create a new sheet, place a view in the sheet and then cut the border and re-paste it). This border would mask an area around the border and show me only what's within a "window" in the middle. Since the titleblock is defined as an 8 1/2" x 11" size, I select such paper size, set to print at 100% and only the area within the 8 1/2" x 11" prints.
In RB 9.1, I had to resort to 2 titleblock families to achieve this: One used as the mask (white filled region with a hole in the middle) and a second used as the acutal letter-sized titleblock family that contains the info. I tried using a white filled region in a titleblock family, but somehow even though it looks perfectly fine in the family editor, the white filled region starts masking the titleblock linework when loaded in the project environement (and hence the reason for the 2 separate titleblock families).
So, do masking regions work in titleblocks? So far they're acting as transparent entities!