Brightness and contrast 3d

Please, if you place a image on a plane or project to a plane how do you adjust the brightness and contrast of that projected image?
And
is there a way to select a part of this projected image so you can adjust that selection only?

thanks
Alistair

I found this but it does not work on current versions. https://indicated.com/blackmagic-fusion ... ntrast-3d/

Brightness and contrast can be done with a 3Bol. There's an addition and multiplication function.

Maybe before or after the projection?