Selection & visibility

Frustum-select elements by dragging a rectangle.

Access: Ribbon → Home → SELECT / VISIBILITY

Select — click an element in the 3D view or in the Scene tree; its properties appear in the right panel. Esc deselects.
Box Select — drag a rectangle to select many elements at once.
Hide (H) — hides the selection. Isolate (I) — hides everything else. Show All (A) — brings everything back.
By Filter (Home → FILTER CLASSES) — show or hide whole IFC classes (all walls, all pipes…) per model.