Does anyone know which button allocation/ set up to key bind for exiting the menu and going back to full screen view?

Issue I have is, when the guide is up and say I've selected chanel 4 and it's playing on the right and the menu is still up but now I've scrolled 5 pages down what key bind do I set so I can just exit the menu from wherever I'm at and switch to full screen and watch what was playing on the right without going all the way back to that chanel to select it?