Alternatively, use the cursor keys to move the cursor. Use the Enter
key to begin and end keyboard `drag' operations. Use the Space key to
-cancel the drag. Use Ctrl-arrowkey and Shift-arrowkey to simulate a
-left or right click, respectively, on the edge in the given direction
-relative to the cursor, i.e. to draw a segment or a cross.
+cancel the drag. Or, hold Control while dragging with the cursor keys
+to toggle segments as you move between squares.
+
+Pressing Control-Shift-arrowkey or Shift-arrowkey simulates a left or
+right click, respectively, on the edge in the direction of the key.
(All the actions described in \k{common-actions} are also available.)