How do I navigate the TV Listings Grid?

It's simple to browse programs in the TV Listings Grid in several different ways.  Press the GUIDE button to access up to 24 hours of program listings information for your channel lineup.  Use your arrow keys (up, down, left, right) to navigate the grid.  Press OK for a currently airing program, and tune to that channel.  Please note: the Rovi DTA Guide does not display programs in the past.