I've been playing with this software for 2 months and I've just discovered nested collections.
For nested collections, as far as I can tell, you add an existing collection to the plus or minus section by clicking on the Open chevron and then drag the collection you want to nest to either of the areas.
Is this the only way or the correct way? Or is there a way to list your collections in the library window and drag them from there?
If this is the only way, is it in the help documentation? If not it should be added. I could not find it.
There is so much functionality that I have not seen or just brushed the surface of.
Regards,
Clinton