[Zubersoft]

You can't rearrange multiple files at the same time. You just need to tap the second file in the file list before tapping on the page order field if you need to rearrange any of the pages for that file. Alternatively, just tap the three dots next to the first tile, tap "Combine Files", select both the first and second file and then you'll have a single PDF that you can rearrange.

Mike