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

If I do it, it must be done optionally.

I usually sync 2 different files with common part, so top lines are different.

PSPad freeware editor https://www.pspad.com

Odpovedet emailem