@Godsdale 

From the router's user guide - Chapter 1.2.1:

Touchscreen:
Use the touchscreen to check basic information, network status, connected clients, guest network, and more.
Swipe the home screen to display system time, network connection, CPU & memory, and weather information.

Hi  @Godsdale 

Using the Tether app, navigate to the LED Sign / LED Display section, then select Slides.

In the Slides section, you can choose which items you want to display on the LED Display, including Date and Time, Weather, Emojis, etc.

If you would prefer to customize the LED Display on your Archer BE900 via the web GUI:

1. Visit http://tplinkwifi.net and log in with your TP-Link ID or the password you set for the router.

2. Go to Screen Display > LED Screen.

3. Enable the LED Screen by toggling the option.

4. Select an LED Mode and customize the settings.

By selecting Slides Mode, you can select and edit slides to auto-display on the LED Display, including slides for date and time, weather, and emojis. You can also customize a slide.