How to select additively?

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#1

Hello!

Sorry for the weird question but how do I select additively in studio? Currently, if I use shift and select a part in studio, then make a second selection while holding shift but said selection goes over the first selection, the common selection will invert if that makes sense. Can I prevent this somehow and only select additively?

Example of what I want not to happen:

#2

Hold left shift and click each one manually.

#3

Yeah but the issue is that I have thousands of parts, is there another way? I could use F3X but is there a way of doing it natively?