JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Dimension the Radius of a Circular Element Select the Dimension Radial tool ( Drawing > Annotate > Dimensioning ). The Radial Dimensioning tool setting window opens. Select the circular element to be dimensioned. Set the mode to Dimension Radius. Fill necessary details in the extended tool settings if needed. Position the dimension and enter a data point to place it. Dimensioning the radius of a circular element Parent topic: Radial Dimensioning