Hi Murray, Thanks for your comments. We're studying different ways of navigating in 3D view, and we'll take this suggestion also into account. By the way, have you noticed that it's possible to navigate with WASD keys using different navigation modes in the full screen http://www.teklabimsight.com/helpcenter/helpTopic.jsp?topic=bim_full_screen_mode If you're missing for the fly functionality, you may find the 'walk around' mode useful. Thanks, Heikki