If I understand, when you choose synchonize with file, you want to synchronize second file with the first (top line) and then start sync process.
I don't think so it's hard to do it, cause you can simply use goto line (Ctrl+G) If I do it, it must be done optionally. I usually sync 2 different files with common part, so top lines are different. -- <https://forum.pspad.com/read.php?2,76093,76095> PSPad freeware editor https://www.pspad.com