-The main usage of selector is as a super shell-history. With the
-correct option, it will inject the selected line into the virtual tty
-input buffer, hence allowing the user to edit the line and execute it
-as a standard command.
+The ^R key switches between the standard multi-substring mode and the
+regexp mode.
+
+The main usage of selector is as an efficient search in the shell
+command history. With the correct option, it will inject the selected
+line into the virtual tty input buffer, hence allowing the user to
+edit the line and execute it as a standard command.
+
+Keys corresponding to ASCII codes between ' ' and '~' add a character
+to the pattern string. The Delete key, Backspace key, ^D and ^H delete
+one character from the pattern string.
+
+The Up and Down cursor keys move the selected line accordingly, and
+PageUp and PageDown move by ten lines. The Home and End key move to
+the top and the bottom of the list respectively. The return key
+selects the current line and exits.
+
+The ^U key erases the current pattern, and you can cancel the
+selection by either interrupting the command with ^C or by typing ^G.