Edit Sets
On the Home tab, the Edit Sets group contains commands that can be used on multiple model objects at the same time. These tools can be used regardless of object type: you can, for example, delete a pipe part, a duct part, and a structural part at the same time.
In some cases, also parts that are associated with the selected parts might get automatically selected. For example, if the selected object has a 3D Space attached to it, also the 3D Space gets selected, unless you disable the Auto-select dependent function from the context menu.