How to place your component/footprint on the bottom side of your PCB in PCB123 is a fairly straightforward process. In the Layout tab of your design, place the footprint on the top board layer. Mouse over this to select and right click. This will open a menu that will have an option of opposite side, selecting this will move your component/footprint to the opposite side of the board.
Barbie Dunham
Customer Support Representative
Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 800-228-8198
Fax: 503-829-6657