One click Subject AND Background masks.

I recently used a webinar instruction with People to create all the potential masks, I saved it as a Style, and then created a Custom Keyboard shortcut. Mine is Subject plus X and with that I create all those People masks. I'd like to be able to do the same thing to Subject and Background. If I use Subject I'm almost certainly going to use Background, so creating both at the same time with a Keyboard Shortcut makes sense to me. I can always choose NOT to use one, but that's no problem. But I can't figure out how to do it, and it may well require a new feature.