How do I return a book early in the ADE Android App?

Hi, I have the ADE app downloaded on my Android phone and I'm trying to figure out how to return an Open Library book early on it. I can only find information on how to do it on a computer, not on Android. There is no small triangle to click on in Android. The only thing I can figure out how to do is delete the book altogether, but if I do that, I won't be able to return it. Open Library allows 5 books to be checked out at a time, and if I return one early I can get another one in its place. Thanks for any help!