How to rename a reel in your library
To rename a reel in your reel library, click on the reel name to open the reel detail page. Click the 3-dot menu in the upper right of the page and choose Rename from the dropdown menu. Then enter a reel name and click the "Rename" button to save the new name.
Note: Changing the internal name of a reel WILL NOT update the display title on the final presentation reel. You must edit a reel and update the title block to change the reel title shown on a reel.