SYNTAX            : CTRL_B

FUNCTION          : Retrieve a previous command. All commands previously
                    entered as command sequence can be recovered using
                    CTRL_B repeatedly. Every time CTRL_B is pressed, it
                    causes the current command to be replaced by the one
                    preceeding it.

                    The counterpart for CTRL_B is CTRL_F.

                    Use CTRL_G to reposition at the most recent command in
                    the history.

MATRIX