Controling an offset of a texture

I have two texture. With an lerp, i’m controling which portion i wan’t to show. Right now, it’s 50/50. The pb is that, during the game, i wan’t to controle the quantity I wan’t to show, sometime it 35/65, some 90/10…

But we need to see an transition. so i tried with a panner, but i cannot control it in a blueprint. I need to be able to control the offset from left to right (so the U…i think) of the texture.

Nevermind, found it