UNDO slider function, back to previous button, Slider undo indicator...

Especally any slider could be used by mistake. as in the image an indicator could help previous position but to go back to it, ı suggest a double click to undo last action.

second suggestion is Each manipulation of any material, light etc. acts as a "session to save" so if we want ot cancel there should be a button to "reset to previous"

these requests are needed when a customer demands something then changes his mind back to previous request. or you are just testing ideas.