Sticky Channel

[khaver]

While watching a show you hit a button or key combination to make that channel "sticky". You can now channel surf, move around in the menus, etc. Hit another button or key combination and you instantly go back to watching your "sticky" channel.

khaver

[psycik]

you can move back to the menus with the click of the menu button (home).

The rest of your query sub would answer to.