There could be a command (that I would then assign to a shortcut / key) that repeats the last assinment of the Properties SETLABEL
command used.
Example: I want to set a "thumbs up" label (or whatever) to a bunch of files, but for some reason it's easier to decide which files are going to be labeled on the fly, so instead of having to choose on the menu the same label over and over again (I know I can set a fixed label directly via a command, but having a command that dynamically sets the last label is easier) I click on a button or press a shortcut with the command (let's say) Properties SETLABEL LASTUSEDLABEL