While using Vim I\'ll sometimes want to look at a function definition or a struct definition, so I\'ll use C-] to jump to it. However, there are a few problems I ru
C-]
To jump back from C-], use C-T. The :tags command shows the current stack.
:tags
Set the autowrite option to automatically save what you're doing before jumping to a new file.
autowrite
Use C-W C-] to open the tag in a new window.
Finally, :help tags is the section in help that explains all this and more.
:help tags