I have been using the ediff mode of Emacs for many years now, and I just realized that whenever I need synchronization points (*) to make sense of a diff, I fall back to Meld or KDiff3.
Isn't there some support for synchronization points in ediff? Or is there an alternative diff mode for Emacs supporting this?
(*) A synchronization point allows you to manually align the two sides of a diff at a selected location. The diff is then computed independently for the first and second part of the two sides.