To be able to work with the Library, you must be in editing mode. Use the following guideline to rename a folder in the Library:
1. Click Library from the left toolbar.
2. Click the folder you want to rename.
Important: You can't rename the folders created by the system, that is, Unsorted and Resources folders.
3. In the Actions menu, select Rename option, enter the new name and then click OK to save the changes.
Note: You can also right-click to open the Actions bar.
That's it. You may also want to learn how to delete folders from the Library.