There is a guide to all the buttons and hardware on the "getting started" leaflet included with the N810. It has a drawing of the N810 with arrows pointing to all the buttons, ports and switches with explanations of what they are. Alternatively, take a look at the Internet Tablet School's video of how to update the N810 firmware, which shows the N810 swap key being pressed (it's the video labelled "Updating the firmware on the Nokia N810"): http://tabletschool.blogspot.com/200...-firmware.html