Whether the logo appears on the start screen at all
Texts
Title and subtitle, for example "Anna & John" and "Tap to start"
Gallery & start buttons
Whether the gallery button appears, whether a tap on the screen starts a session instead of the start button, how the buttons are arranged (side by side or stacked) and where they sit (top, bottom, below the QR code)
Live view as background
The running camera image behind logo, title and buttons
Colours, font and the logo file itself are not here but under Appearance — they apply to the whole interface, not just the start screen. Only whether the logo is shown on the start screen is decided here.
Puts a button on the start screen through which guests can see contact details or report a problem. Label, title and content are freely chosen; the default is "Contact / report problem".
"Language selection" defines which languages are offered to the guests of this party. That is something different from the language of the admin area, which lives under "System and device settings" > "Language" and stays with the device.
A notice screen before the session — for privacy, terms of use or warnings. The content is entered as HTML and used unchanged.
Directly afterwards a custom notice screen can follow, with a freely chosen label for the continue button. It is meant for anything beyond a simple notice, such as a worded consent.