:ta <name> | Search in the tags file[s] where <name> is
| defined (file, line), and go to it.
^] | Use the name under the cursor in a `:ta' command.
^T | Pop the previous tag off the tagstack and return
| to its position.
:[x,y]g/<string>/<cmd> | Search globally [from line x to y] for <string>
| and execute the `ex' <cmd> on each occurrence.
:[x,y]v/<string>/<cmd> | Execute <cmd> on the lines that don't match.
This section is based on "Vi Reference" by Maarten Litmaath et al.
© 1993-1998 Christopher C. Taylor