-standard readline ^R bidding. The -v option will inject the selected
-line into the tty input buffer, allowing the user to edit the line and
-execute it as a standard command.
+standard readline ^R binding. With the -v option, it injects the
+selected line into the tty input buffer, hence allowing the user to
+edit the line and execute it as a standard command.
+
+Selector is also a handy tool to test regexps, or to display menus
+with many possible choices. For the latter, the -x option allows to
+specify a label delimiter: the part of each line before that character
+will appear during the selection, but only the part after that
+character will be returned.