Like in photshop where you can lock scaling proportionally with the shift button....but also lock strokes vertically, horizontally, maybe even diangonally for the pen or whatever tool you use. It would be nice for non-organic modeling. By the way your program is simply incredible. I do have Z3. 3dconnexion control was what brought me over here. Very intuitive GUI. I'm sure 3DC3 will rock. You could use some quality Alpha packs to go with the upgrade might help other artists see the potential... cause I do. - thank you for all your hard work. - G