How do I see a ticket full screen?
Open the ticket, then turn the phone sideways. There is no button for this. Lumoria is locked to portrait everywhere else, but the ticket screen watches for the turn.
What happens
Everything else fades out. The ticket rotates up onto a plain black background and takes the whole display: no tab bar, no status bar, no buttons. Turn the phone back and the rest of the screen returns. Nothing is saved and nothing is changed: it is a way of looking, not a mode you enter.
Journeys with several legs
A trip made of several legs shows one leg at a time on the black background, with dots to say where you are. Swipe to move between them.
The other way to look closely
In the gallery, press and hold a ticket. It lifts off the page with a deeper shadow and one stamp of haptic feedback, then settles back when you let go. It is the closest thing to picking a stub up and turning it over. The same hold works on the tickets inside a Memory.
With VoiceOver on, that lift is an action called “Inspect ticket”, so it doesn’t depend on holding the screen.