If you place a Cadimage Switch object using the Electrical tool. You may change ‘manually’ the switch connection to: Single switch 2-Way switch Intermediate For ARCHICAD 20 go to the Cadimage Switch settings For ARCHICAD 19 Just go to the settings> Symbol>Specification>Display settings:
If you are placing lamps in a hallway or stairs, you may need to have a three way switch at both ends of the stair. Just place the regular switches using the Cadimage Electrical Tool. Finally select the lamp(s) and the switches and go to the menu Cadimage>Electrical>Add Wiring.