I am currently working on a 2 storey building. The main floor is deck and joists, the second floor is hollow core and the roof is deck and joists. When working on the 2nd or roof floors I can still pick the floor system below...because of this I have accidently modified the beam system below without even knowing it.
Is there a setting that I can change so that I can only modify the beam systems that are on the plan that I am currently working on?