As a user I want mark all objects of a special type in a certain area in order to switch some properties for all instances of that type.
Example: I have some notes, connected by arrows. I want to mark all notes to change size or color. Unfortunately if I select the area, the arrows are marked as well and changes for notes not possible.
I had a similar use case. This is my solution
Select all items in a specific area → in the popped up menu bar (with lock item, group, aligned etc.) click on filter (XX objects) → select the type.
Hope that solves your problem, too :)