Describes tools that let you measure radius and diameter.
Measure the radius of a curve or arc
The locator appears and shows the radius of the curve at that point. When you release the mouse button, the measurement is attached to the curve.
A point (cross) indicates the center of curvature (that is, the center of a circle having the same radius as the curve at the position of the locator).
Measure the diameter of a circle
The locator appears. You can move the new measurement while the mouse button is down. When you release the mouse button, the measurement is attached to the circle.
To see a continuous comb plot of radius values along a curve, use Locators > Curve Curvature with the Plot Value option set to Radius.
Use the Locators > Move Locator tool to pick the label, then open the information window and turn off the arrow option.