How do I add a box to the top center of this box please?
Work in the view that you show in the screen-capture you posted.
Insert a Box, Vertex-snapping to two diagonally-opposing corners of the top
of that already-drawn Box; Tab into the "Height" field in the Inspector Bar after having Vertex-snapped to the corners but before finishing the insertion, and enter your desired "Height" value.
Now immediately select the Box (F7 should work; or just select it using the Selector Tool). Change it's X and Y values either via the Inspector Bar or in the Selection Info Palette "Box" section (if your version-16 has this capability).
« Last Edit: December 10, 2016, 01:44:30 PM by Alvin Gregorio »
(mostly Residential Architectural 2D; no formal CAD Training; intermittent TurboCAD user since yr. 2000 [ver6.5])
---TurboCAD: V20.2PP(57.0)[as of 3/12/15]; V19DL(54.2); V11.2Pro; Windows-7-Pro/64-bit; Intel-Core-i3 CPU; 2.27ghz; 4GB RAM; Intel HD Graphics (CPU based)