Question:

After adjusting the elevation of a sunk slab, I find there are gaps between the slab and wall/column. Do I need to adjust them accordingly?

Solution:

By default, the elevations of wall and column are floor bottom elevation and floor top elevation respectively. When there is a sunk slab, if viewing the model of one floor, the gaps are visible. But there are walls and columns in the lower floor, so if viewing the model of all floors, the gaps will disappear.