Diameter
Dimension the diameter of the circle, and arc in the parallel projection. You can change the dimension properties before selecting the element to be dimensioned.
- On the
tab, in the Dimensions group, select Dimension, and select 
Diameter. - Select the dimension properties.
Dimension Properties - Select an arc or a circle.
- Select Confirm.
Note:
- Select in the adding of Radius or Diameter dimension the reference line to the the dimension. Dimension with a Reference Line/Simple Dimension
You can dimension the diameter of a cylinder face by selecting the Dimensions function. Select the cylinder face in the projection between the silhouette lines.
Note:
- Dimension a thread by selecting the edge of the hole. The thread length is added as a base dimension.
