How can I select multiple objects (polygon groups) in v3 at the same time?
If they’re polygon groups, the easiest is to Ctrl+Shift+Drag on any part of the mesh that you don’t want selected. Release Shift before releasing the mouse. This will hide the selected polys. Now Ctrl+Shift+Click on polygroups that you don’t want. You’ll be left with only the ones you do want.
Alternatively, Ctrl+Shift+Click on a group that you want to show only it. Now Ctrl+Shift+Drag on an empty bit of canvas to reverse visibility. Ctrl+Shift+Click on other parts that you want (hiding them). When all desired parts are hidden, reverse visibility again.
Thanks Aurick. Is there a such thing as having a polygroup within a polygroup?
Nope. In that case you’d want to go with subtools.