A minor Google+ update rolling out over the next few hours makes managing cover photos easier.
Google+ will now automatically resize new cover photos to fit their non-standard slot. Users can then drag and drop the photo within the frame to perfect the fit.
Cover photos also got their own gallery under the photo tab to make switching between them easier.
In addition to the cover photo updates, Google+ is pushing out a new profile share box. Previously, users have posted to their profiles via the home screen. The new box lets them instead post updates directly from their profile page.