If we delete files from the Design folder (our workset) and these files were used in Program Manager for Design Options, we should have notification when we start OBD that there are no these files and existing Design Option was changed.

Enable Program Area of a space to constrain its size (rubber-banding capability) so user can adjust a side and have the shape respond. 2D constraints in MicroStation can do this, see video (the video is real-time; scrub through to get the picture ...