Besides using the classic TV Guide apps (TV Guide, Vertical Guide and Channels), you can also use the "virtual banner" by pressing the or arrow key when watching Live TV.

This will open the "virtual banner", starting at the left with the channel list. Go up or down to check what's playing on the different channels.

You can go on a give channel to display the different programs that are scheduled before and after the live program you're watching.

You can also perform an action on a selected program then (Watch Live, Record, Open in (App), Replay, Startover, Info ...)