Dimension context click on radius/diameter

SketchUp Pro 21.0.338, Mac Big Sur 11.1
The on-line help topic on dimensions says I should be able to context click (right click) on a radius or diameter dimension and get a pop up that allows me to select a “type” of either radius or diameter. This is what I get when I right click on an existing radius dimension. I don’t see a “Type” option. What am I missing? (For some reason my screen capture “ghosts” the pop up)
2020-12-29_09-24-36

Dimension the circle, not between the edge of the circle and the center.

Dave,
Okay so there is a little trick, not quite obvious in the help topic.
Thanks, I give myself about a 40% chance of remembering this the next time I want to use it :slight_smile: