In your destinations list the arrow against each destination on the right is a separate button. Click that and you are given 3 options on the next screen:
Favourites - toggle on/ off
Delete which takes you to a delete confirmation page
Store which goes to a page which allows you to edit the destination name - confirm the edir by clicking the floppy disc icon at bottom right.
Not covered any where in the user
guide as far as I can see.
Hope this helps.
David