I am REALLY new at Sketchup and am already struggling with the most basic of questions…

I am struggling to find the centre of a circle… If you draw a circle, then there is a dot in the middle… But as soon as you ‘pull’ it into a Cylinder, the centre disappears.

I assumed that I could draw a couple of lines across the diameter… But I can’t even work out how to measure the diameter of the circle.

The only method I have found is to use the tape measure and set it on one side of the circle… Then zoom right in and move it along the opposite edge… Then simply move back and forth until I find the highest value… But this doesn’t seem like a very accurate/scientific way of doing it.

Is there another way??

Jon