When I click on a constraint in browser, the geometric entities in 3D model view aren’t marked in red (or other colour).
How do I correct this?
currently we do not have an actual visualization especially for constraints or loads, although we are working towards this.
For now, if you want to have a visual feedback for the assignments you can use the select assignment button below the assignment box. This will select the assigned entities in the viewer and you see them highlighted in red.