RefTeX can display cross-referencing information. This means,
if two document locations are linked, RefTeX can display the
matching location(s) in another window. The
macros are one way of establishing such a link. Also, a
macro is linked to the corresponding
\bibitem macro or a BibTeX
The feature is invoked by pressing C-c &
reftex-view-crossref) while point is on the key argument
of a macro involved in cross-referencing. You can also click with
S-mouse-2 on the macro argument. Here is what will happen for
individual classes of macros:
\refmacro are active for cross-reference display. This works also for labels defined in an external document when the current document refers to them through the
xrinterface (see LaTeX xr Package).
\labelmacro but also other macros with label arguments (as configured with
reftex-label-alist) are active for cross-reference display.
\bibitem. All usual variants2 of the
\citemacro are active for cross-reference display.
\glossarymacros, all macros configured in
reftex-index-macroswill be recognized.
While the display of cross referencing information for the above
mentioned macros is hard-coded, you can configure additional relations
in the variable