Bug. ??? If tabs headline I'd on, then the top of the document can't be viewed.
I noticed when I turned tabs on so that I could see multiple document titles, I could not see the top few lines of page 1 of the document I was viewing.
what I had to do is double-click or click in the center of the document to turn the top lines of the tabs and editing display off and then I could see the top few lines of the document I believe this is a minor bug and you might want to look into fixing it.
AdminXodo (Support, Xodo) commented
If you are experiencing this error, then it is likely a bug. It is not something we have seen during our test though. So I would recommend sending us an email at firstname.lastname@example.org, describing the problem, including a screenshot of it, as well as letting us know what device you are using and what version of Android you have.