I have a plan with several walls that do not touch the floor (i.e. there are major ceiling height changes in a certain area of the floor).  I'm trying to set up a plan so that those walls do not show.  Since none of the walls come to within 2' off the floor, I set the Design Layer cut plane to 2', but nothing changes in either the design layer or the sheet layer.  Any suggestions as to what I'm missing?  This is not the first time I've tried to use this option, and it's also not the first time i