Click on the tiling you want to work on. A properties panel will open on the left.

Click on Edit Shape in the left panel. Once in the Sketcher mode, sketch the necessary changes in place of the old tiling and click Apply to save changes.

Enter the desired value into the Tile Depth field and press Enter.

Click on Tiling drop-down menu in the left panel, and enter the desired distance of the tiling base from the floor level, into the Elevation field.