No - buttons are almost never right clickable except for in a few cases I’ve seen in other applications, all of which are bad UX decisions because it’s a control people don’t expect to be right clickable. So we didn’t design the standard button widget to support that behavior. Inheriting from UButton won’t solve it either, you’d need to implement a new slate widget with that functionality. If you just need to detect right mouse button down and up, that’s achievable with the overridable functions on all user widgets. With that you can make your own right clickable button widget.