Tom,
When you are connected to the remote K3, then you are only controlling the menus on that (radio) side
and not the control side. In order to change menu items on the control side, you must disconnect first.
Since hitting the power button starts the remote connect, this would mean unplugging something to
prevent the remote connect.
All menu items are available from the control side.
73,
Mitch DJ0QN / K7DX