By simply pressing the TV Control Button on the Wii U GamePad, you’ll have access to digital buttons that allow you to control the television as if you’re using a designated TV remote. The digital buttons, which appear on the new controller’s 6.2 inch touchscreen, allow you to turn your TV on and off, change channels, switch between various inputs, and control volume. The Wii U GamePad’s digital buttons can also function with cable boxes.
Nintendo detailed many functions of the Wii U GamePad during the pre-E3 Nintendo Direct. Nintendo revealed that you can use it as a universal TV remote - all you have to do is press the TV Control Button, which is just left of the Power Button. Nintendo also promised that the Wii U GamePad will act as a TV guide by showing information about television programs on its touchscreen.