Store the rendersize/resolution in Camera? Possible?

I was just wondering, if it is possible to store the rendersize in the camera. If for example you build up a room and want to shoot different takes. One in landscape format, the other in portrait … or the one in A4 the other in A3…

Do you know a way how to do this without having to change the rendersettings itself?
So that, befor rendering…you can swap between the cameras and see the correct layout?

An idea?

Thanks in advance