Using Ray's virtual remote, it is super simple to channel surf to your heart's content!
Once you're watching live cable or satellite TV, tap Ray's remote icon (at the right of the bottom navigation bar) to open your cable or satellite virtual remote
Tap the "Channels" tab at the top-right to switch to the Channels panel. To surf channels one-by-one, swipe up or down on the touchpad.
If you want to go to a specific channel number, tap the button at the bottom-left of the touchpad. Enter the channel number in the number pad and tap "enter" when done.
Alternatively, you could add “channel up” and “channel down” buttons to your "virtual" remote’s button grid, and then use those buttons to browse sequentially through channels. Find out How to Customize Your Remote Buttons.