enable pointer movement in cwm via C-<arrowkeys>

looked over by oga@

cwm.1

@@ -132,6 +132,14 @@ Set sticky group mode on.
 The default behavior for new windows is to not assign any group.
 This changes the default behavior to assigning the currrently selected
 group to any newly created windows.
+.Pp
+.Sh POINTER MOVEMENT
+The pointer can be moved with the use of the keyboard through bindings.
+C-[UP|DOWN|LEFT|RIGHT] moves the pointer a small amount, while
+C-shift-[UP|DOWN|LEFT|RIGHT] moves the current window a larger amount.
+For example, to move the pointer to the left by a small amount,
+press C-LEFT.
+To move the pointer down by a larger amount, press C-shift-DOWN.
 .El
 .Sh WINDOW MOVEMENT AND RESIZING
 .Nm