How to Set Up Undo Function on 8BitDo Zero2 Remote

Hi Everyone. I’ve set up almost all commends the way I’d like to using Karabiner Elements, Anki, and the 8BitDo Zero2 remote. I don’t know how to set up the L key on my remote to “control + z” in Anki, so that I can use the palm of my hand to rapidly undo my actions on a card and go back while moving through flashcards. I am a mac user. I know how to set up one button as command and another button as z. I’d prefer to push one button for undo rather than two- it works better with the way I’m holding the remote. The other posts that I’ve seen about this haven’t been very helpful.

I’d appreciate any help you can give me with this.

you can either set it to “u”, which pretty much does the same function. or if you can add the custom keyboard add on and configure z to function like command + z.