How do I return to gallery from viewing photo full sized?

[Android Central Question]

When I open gallery and clik on a photo and then expand it to view full screen size on my android, I can't get back to the gallery or anywhere else. There is no button or link and no swiping lets me return. There is only black around the photo. How do I return?

 

[Ry]

What phone?

What photo app?

 

[B. Diddy]

Welcome to Android Central! You can't tap the Back button? If your phone uses onscreen nav buttons, and you don't see them at the bottom of the screen, swipe up from the lower edge of the screen to bring the nav buttons back.