I’m trying to get a animation to play when a button in the menu is focused. But there aren’t any actions for when focus is applied on something, like there is with hover. How could I apply this?
In any interface that goes beyond the most basic, you’d wrap a native button with a user widget; which gives you access to:
Rather than using the native buttons, you make the interface from those user widgets. As a massive accidental bonus, if you decide you’d like the button to look slightly different, now you need to modify 1 BP, rather than find a bazillion buttons across a dozen menus. Consider it if you haven’t already.
What inputs did you use?
You asked about Focus. It does not require input per se. Use whatever input you need.