To create a sub-collection under a collection, click on the desired collection and select "New Collection".
To move a Sub-Collection to become a parent collection, drag and drop the sub-collection to the Collections tree. A blue line will appear indicating to the release the collection being moved.
Imports within collections are moved via a right click - Move to Collection-
Renaming collections is done in the same manner as renaming a folder in Windows - click and hold on the node briefly, then release the mouse click and the collection name will become editable. Additionally the F2 keyboard short cut will enable the collection to be renamed.
