Just another question: I do see in the Moi Command reference page, in the 'drawing on surfaces' topic, that there is an 'On srf' object snap that lets you snap a point directly on to the surface that is under the mouse. Really, we do see that there is such a command, already activated, when we click on the small arrow (which is on the top of the 'object snap' button in the ui) that opens a snaps list scroll, but how does it work? How do we draw a freeform curve, for example, so that it may be drawn snapped on a surface of a sphere solid? I am trying to do it but in vain. Some help?