+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
+the PageUp and PageDown move by ten lines. The Home and End key moves
+to the top and the bottom of the list respectively. The return key
+select the current line and quit.
+
+You can cancel the selection either by interrupting the command with
+^C or by typing ^G.
+