Return to current directory when opening a picture on Android App

I’m using android seafile app and in my reservoir I could swipe left and right to view pictures in the directory, but how could I return to the directory? I see the buttons on the top of the screen (see picture postscripted), but none of them could let me get back to directory. So, have I to close and restart the seafile app to this folder? This is what I’m doing but I think that’s too tedious. Could anyone help? Thx!

Hello just use the return key on the phone

Watch the video, it works like that for me.

I pressed the left edge of my screen for ~1 sec and then slightly swipe right for a short range to return. Many thx for you, too.