Show unchanged lines only for context in the text diff view
Option for the built-in diff window to show only a few (maybe configurable) unchanged lines around each changed line.
We have some multi-metabyte files with many thousands of lines and sometimes a few lines change and it is hard to scroll or click move around with such a large file. The buttons "to to next/previous change" are useful, but it is a lot more messy to actually see the diff.
See the attached file for a comparison with Araxis merge for an example.
In Araxis, we can see more information on the same screen.
Have you seen our built-in semantic differences?? We use the outline of source code to collapse differences. Does it help? Or do you have in mind something that is not C++, C, Java, C# or VB.net??