Vim is a clone, with additions, of vi text editor program for Unix.
* Goto a line. Press Esc, type the line number, and then press Shift-g. If you press Esc and then Shift-g without specifying a line number, it will take you to the last line in the file.
* Goto the definition. With the cursor over a keyword, press gd or gD.
* Go back. The quickest way is to hit either: ‘' (two apostrophes) or `` (two backticks). Note that the difference is that the backtick goes to the same location on the line, whereas the apostrophe goes to the start of the line.