TP-Link 15RTC - Manual (Page 20)

4. Blue Screen
Press the up(▲) / down(▼) button to select the blue screen.
Press the right(▶) or ENTER button.
Press the up(▲) / down(▼) button to select on or off.
Press the MENU button to save.
19 …………………………………………………………………………… INSTRUCTION MANUAL