Crest · every screen and branch

Each phone is the live CrestPrototypeV3, opened at that state. Every line has a code: it leaves a screen tagged 5a and arrives tagged 5a. Click a screen’s title to show only its lines, plus a list of where it goes and what leads to it; click an item to select that screen (its title turns green). Click the title again to see the phone. Click empty space to clear. Phones stay interactive.