Fundamentals > Creo Parametric User Interface > The Analysis Tab > Measuring Geometry > Measuring Entities > Using Specific Measurement Types > Distance > Using Reference Entity Options > About the Center Option
About the Center Option
If you select a curve or edge that is shaped like an arc or a circle, with the Center option you can measure the distance from the center of a curve or edge. Clear this option to measure from the edge instead of the center.