where is this option ?"follow surface"

[mike99]

I got this in the WIKI, "Use the top edge of the newly shaped spiral to create a reference line using the “follow surface” option"

so that ,where is this option ?"follow surface",after I select the edge of a surface

thanks a lot

[Scott Davis]

Follow Surface is an option that becomes available in the Options Bar when you are in the Conceptual Massing enviroment, and drawing lines. It allows you to draw on the surface of an object, or pick lines that are part of that surface. Would you lease provide a link to the Wiki page where you found this so we can get some context? Also, what are you trying to accomplish?

[mike99]

thanks,I'll try it again

I'm just learning this one,the class in the AU,