Detailed Drawings > Annotating the Drawing > Dimensioning the Model > Inserting Dimensions > To Automatically Dimension Radial Patterns
  
To Automatically Dimension Radial Patterns
1. Click Annotate > Dimension or Annotate > Annotations > Reference Dimension. The Select Reference dialog box appears.
2. Select an arc of one of the pattern features. You are prompted to select additional entities to dimension.
3. Press and hold CTRL and select the base point to dimension against. For example, you can select an entity outside of the pattern.
4. Middle-click to place the dimension. A confirmation message appears.
5. Click Yes. The remaining pattern members are dimensioned.