In the navigation menu, you choose Toolbox. From there, you choose virtual background.
You select the profile that the QR code in the top right corner will direct to. Additionally, you have the option to add photos either by copying them from a search or a cloud service or by selecting some from your library. You can choose which fields will be visible on your background. These fields are dynamically pulled based on the profile you have selected. Finally, you set the color of the font and the QR code.