Adding linework to 3D views

[WolffG]

Is there any way to add simple linework to 3D views (hidden line)? All the line tools seem to be grayed out in this view.

[aaronrumple]

From the basic menu -> Linework.

[sbrown]

not in a perspective, but you can always place it on a sheet and use detail lines on the sheet, just beware these wont' be part of the view so if you move it you need to move the lines too.