hi, in addition to the 'modifying secondary elements' as my eponymous wrote, which intervenes on all the thickness of the floor, you can in the floor structure check the 'variable' box only for one of the layers, in this case acting on the 'modification of the secondary elements' such change will affect the layer you decided 'variable'
I'm creating a "planimetry" with "floors"
with an internal layer that "fits"
I would like to ask if there is the possibility in 2009 not to allocate the quota to a point "grip" in "modifica elem secondari" and instead to make it a point automatically , an intermediate point, not to let it break the surface