A few weeks ago I wrote about Emacs’ Follow mode. It turns out that searching for follow-mode on my blog reveals an old post about Ibuffer which is very short and unfortunately a bit misleading. It seems that the mention of Follow mode there was really meant to mean Next-Error-Follow mode. It is a completely unrelated, but also useful concept. When you open a buffer with references to various places (like an Occur or Diff buffer), you can say M-x
next-error-follow-minor-mode, and moving around in that buffer will automatically jump to the relevant position in another window. It’s a great way to quickly see the results of a search, differences between files, compilation errors etc. in context.