I read that as meaning that he wanted the highlighted channel in the Guide to be the channel that was/is playing.
I'm pretty sure at present the Guide is displayed with the first channel in the list highlighted, which means that you have to scroll down to the channel you were up to again.
I think the behaviour is different depending on whether you. Yep, this is how it works;
If you go into the Guide, scroll down to a channel you want to watch, press OK to get to the menu, press Watch to play, then:
Press the Guide button while playing a TV Channel live. -> Goes back to the Guide and the highlight is positioned at the top of the list of channels. If the option mentioned is not ticked, the channel keeps playing in a small windows at the bottom right.
Stop playback while watching a TV Channel live. -> Goes back to the Guide and the highlight is positioned at the channel you were just watching.
Press the "Back" button to go back to the Guide. -> Goes back to the Guide and the highlight is positioned at the channel you were just watching. If the option mentioned is not ticked, the channel keeps playing in a small windows at the bottom right.
The option in question is in Tools -> Options -> Theater View -> Pause video playback when entering Theater View