Indirect buffers is another awesome feature of Emacs, that AFAIK no other editor is capable to do. You can basically clone a buffer of the current file and work

Indirect buffers is another awesome feature of Emacs, that AFAIK no other editor is capable to do. You can basically clone a buffer of the current file and work in two (or more) buffers like they all belong to completely different files. It's handy when you're writing a function that uses things declared somewhere else in the same file. Instead of jumping back and forth you just clone the buffer and you can collapse and narrow things independently.