Center Radius Measurement

The Center Radius measurement tool places specialized markups that calculate the radius a circle based on the position of the circle's center and one point on its circumference. While a Center Radius measurement can be used to create a markup that is an arc, by default it creates full circles; for a potentially simpler way to create arcs that also measure radius, see Three-Point Radius Measurement.

Before placing a measurement, it is recommended that you set the page scale for the document first. When trying to place a measurement on a page that does not have a page scale, you will be prompted to set the scale.