Your comments

I agree with Grzegorz. Otherwise, the default for new tables should be configurable as global setting for whole model.

Other related problem is when you've got really large DB model (e.g. 40 copies of some table) and you want to batch set this "Fixed size" setting. Surely batch actions on group of tables is separate issue, but the problem gives nice rationale to implement batch actions (or maybe it's already there?).

Best regards!
Łukasz