I just got the new beta interface for the first time. To be honest, I find it totally confusing. Some of it makes sense. There's two text boxes, highlighted in yellow and blue. I get that. The blue one on the bottom is what I wrote, the yellow one on the top is what somebody else wrote. So far, so good.
Then, there's a button with up and down arrows which flips those two. I don't understand this. It switches which is on top, but other than this trivial layout change, I don't see that it performs any useful function.
My text has two controls on it, a checkmark and an X. Again, I have no clue what these do. The checkmark has a tooltip, "Apply your changes to this text". I don't understand what that means. Does it mean, take this change and automatically merge it into the other text? The X tooltip says, "Discard all your changes to this text". I'm afraid to even click that one because I don't know what it'll do. Discard permanently with no way to recover the text?
Sorry, this is just totally mystifying. And I say that as a software engineer with many years of using merge conflict resolution tools.