I must be missing something simple, I guess. I have a part I'm trying to dimension that has a radius on both ends. Flat part with no straight sides where I want to dimensions. In Acad, you could type "quad" from the command line and pick the extreme edge of a radius, the using the "quad" command again, pick the opposite radius for a dimension from extreme to extreme. Is there something I'm missing? BTY, I'm using 2K3 R. Wink