Is it possible to convert a collection into a collection set. I have two scenarios I am trying to deal with right now.
1. I have two separate collections. I would like to move one collection into another, such that collection A contains what was in collection A plus the collection B i move into it?
2. I have photos I want to make into a collection and place into another collection. The dialog box only allows you to select current collection sets.
To do this do I really need to basically start over and create a new collection set and new collections in order to move them into the collection set?
Not possible. Why don't you do this?
Library-Grid View [ G ]
Click on Collection B
Cmd/CTRL A to select all
Drag (by grabbing the thumbnail - not the frame) into Collection A.
1. Select all the photos in B and place them into A
2. Place the photos in a new collection. Then place the photos into the other collection.
I don't see why collection sets are needed from your description.