How can I rename a file or folder in a Collection?
Open the Collection

To open a recently accessed Collection, click File → Open Collection. Alternatively, click Browse... to select a Collection that is being newly accessed.
Rename a File in List View

In List view, click the file name you wish to change.
Open the "Rename" Dialog

Click the file name above the embedded display window.

Type the new file name, then click OK.

Alternatively, right-click the file name (or Ctrl-click on Mac) and choose Rename... .
Rename a File or Folder in Folder View

Click the "Show folder view" button to view the Collection folders. Click the triangle next to the folder icon to show the folder contents.
Rename a File

Click the file name, then soon after, click the file name again. Type the new file name in the editing box, then hit Return.
Rename a Folder

Click the folder name, then soon after, click the folder name again. Type the new folder name in the editing box, then hit Return.

Alternatively, right-click the file or folder name (or Ctrl-click on Mac) and choose Rename....

Rename the folder and click OK.