Shortcut for Tagging Files

[AlexXY]

I have a number of screenshots that need to be reviewed with some to be deleted and some to keep.
I am familiar with the Preview Pane, but I don't know of a quick way to tag files to be deleted or te be kept.
Is there a shortcut for marking Yes or No or for different tags?

[highend]

You could write two simple tag scripts and put them on keyboard shortcuts to do this (pro version only, ofc)?