Add option to connect using QR code.

In some enterprise settings, the Wi-Fi networks have restrictions that disable Bonjour services, which are typically used for auto-connecting devices. This results in attendees having to manually input a PIN code every time they wish to connect their iPads to the presentation, which can be both time-consuming and annoying.

A QR code feature would offer a simple, fast, and straightforward way to connect devices. Instead of manually inputting a PIN code, attendees could simply scan a QR code displayed on the presenter's screen to instantly join the presentation.