-With the mouse, drag a peg from the tray on the left-hand side to its
-required position in the current guess; pegs may also be dragged from
-current and past guesses to copy them elsewhere.
+With the mouse, drag a coloured peg from the tray on the left-hand
+side to its required position in the current guess; pegs may also be
+dragged from current and past guesses to copy them elsewhere. To
+remove a peg, drag it off its current position to somewhere invalid.