Multi-Connect basically means that you can control multiple devices simultaneously with a single mouse or keyboard. This is possible by establishing different connections with different devices. For example, a Bluetooth 3.0, Bluetooth 5.0 and a 2.4GHz USB dongle connection. For more information see this page.
Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device
Choosing a selection results in a full page refresh.
Press the space key then arrow keys to make a selection.