[gareim]

Swipe from the very edge of the screen, and it takes you "up" (or "out", however you want to term it) a page.

So if you've selected a photo, a swipe down dismisses the photo. From there, a swipe in from the very edge of the screen brings you out of the current album and back to viewing all albums.

I will make a video demonstrating it if you would like.

Initially, this behavior may seem weird to some from outside the iOS ecosystem? But dismissing photos by pulling down seems to be common UX with modern apps. And swiping from the side feels so natural, that apps that don't implement it (10%?) are jarring. It could be said that a weakness here is that Apple does not enforce universal usage, but most apps have implemented it well. When it does work (90%?), my thumb appreciates not having to reach the bottom left of the phone.

[SenHeng]

There's a high possibility that many people haven't discovered that feature because covers often interfere with the swiping from outside gesture. Or anything related to touch at the edge of the screen, like dragging apps onto the next screen.