Moving or renaming a Collection
In order to move or rename a Collection, select Move from the appropriate context menu. Move can be used to literally move a collection as well as to just renaming it.
Opened context menu with selected Move command
An appearing dialog box asks for either the new collection-URL whereto move the collection or for the new name respectively. Confirm the changes by clicking the OK button.
Dialog box for entering the new name or collection-URL
That followed, the collection gets moved or renamed accordingly.