I am using PM 5 on MBP with OS X Lion.
In order to speed up the editing process of photos by tagging/untagging them, it would help if the current key combinations Cmd+ and Cmd- (for Tagging/Untagging) can be reassigned to the Up/Down arrow keys on the keyboard. This will greatly improve the ergonomics and speed, while using the Left/Right arrow keys to scroll forward and backwards through the set of images.
Appreciate your feedback on this.
Thanks,
Clemens