How to select all objects from different Collections or Hierarchies? I can not believe this is so hard to do in Blender..
I just want to select objects from different Hierarchies or Collections..I just came to Blender from C4D for about a week...But I loved Blender quickly.. till today...
Middle mouse click on parent object in C4D, will select all hierarchy objs included parent obj..With holding Ctrl/Command, I can select several Hierarchies' objs easily.
I found &quot;select hierarchy&quot; command in Blender in right click menu, But it dose not work with multi Parents or Collections selected..
What should I do ? Or some add-on will help ?
Is this the basic objects management in a Basic 3D software?
I think this is the method so far if there is not many Collections or Hierarchies to select.
Here are the steps:

Turn on &quot;Extend Mode&quot; for select grouped, shortcut F9


2.Select one Parent, Shift+G, select children.

3.Hold Shift, select another Parent, Shift+G for Children selection...
so on..

If there are 50 Hierarchies....
But I think it is not hard to make a Python script for this kind of selection.

Select all parents.
Run Python, Loop for all these selected parents, Each loop for children selection extended.

Hope easier life for using outliner...