They can be useful for debugging (@pxref{Error Debugging}).
To catch a user signal, bind the corresponding event to an interactive
-command in the @code{special-event-map} (@pxref{Active Keymaps}).
+command in the @code{special-event-map} (@pxref{Controlling Active Maps}).
The command is called with no arguments, and the specific signal event is
-available in @code{last-input-event}. For example:
+available in @code{last-input-event} (@pxref{Event Input Misc}. For
+example:
@smallexample
(defun sigusr-handler ()
user signals like @code{sigusr1} are normally handled in this way.
The keymap which defines how to handle special events---and which
events are special---is in the variable @code{special-event-map}
-(@pxref{Active Keymaps}).
+(@pxref{Controlling Active Maps}).
@node Waiting
@section Waiting for Elapsed Time or Input