Ctags
Resources
Generate tags so that you can jump to function definitions in a file or in a group of files. tags will also find their definitions in other files in the director(ies) it was generated in
To generate tags: ctags -R .
this generates a tags file and now in your documents you can use
the following keybindings:
ctrl-] jump to definition
ctrl-o go back to prior position
ctrl-i Jump forward
:h tag-stack for more info on tags