**Must know Live Link** UE4 expert only. Need 3 facial expressions triggered by key presses on the keyboard

I have an Unreal Engine 4 project with a cartoon character, it's all ready for live link. But there are three expressions I can't seem to get from live link. So I need 3 keyboard keys assigned to trigger those expressions.
It can be "Y" for super happy, B for super sad, and H for super angry. It must not disconnect the live link when the key is pressed and not affect the head position of the character