Multiple libraries in one collection

[TheDreadPirate]

Collections are not automatically updated (except by the TMDB box set plugin).  Nor can you add whole libraries, you can only add items.  But you can "select all" and add shows/movies in bulk.

Click on "..." for the show and "Add to Collection".  This will bring up a menu to add to an existing collection or a new collection.  If you click and HOLD on an item it will bring up the multi-select UI.  In the top right click on "..." and select all, or click on the items you want to add, and add to collections.