I'm sure I'm overlooking something but... I'm wondering if anyone can tell me how to get the radial or diameter measurements to work in 3D measurements. I have a project that has some vessles and equipment in it that I would like to know the diameter on. Selecting the vessles/equipment doesn't tell me the size so I was hoping to use the radial/diameter measurement. Once the command is selected, I can not get it to reconize any center points or arcs to establish the measurement I'm looking for. Is the software not designed to do this? See attached file. Go to My views and select equipment selections to get an idea of what I'm looking for.