if you place a mesh in 3D wall, Allplan in most cases guess the right coordinates. But sometimes the coordinates are wrong and if you trust Allplan suggestion, the mesh falls outside the wall, although software should put it right as the 3D coordinates of the wall are very well known.
Is any convention how to know what coordinates to use in dialog box?
I want to use span meshes for this purpose instead mesh shapes as they are more convenient for entering openings later and other modification purposes.

Check the video here: