What's New: Creo Parametric 4.0 > Detailed Drawings (Detailing) > Improvements to Dimension Arc Attachments in Detailed Drawings
  
Improvements to Dimension Arc Attachments in Detailed Drawings
Dimensions created between arcs, circles, or cylinders can be adjusted.
Release: Creo Parametric 4.0
Benefits and Description
You can watch a video that demonstrates this capability.
Dimensions created between arcs, circles, or cylinders can be adjusted to reference the near tangent, far tangent, or center of each arc attachment. These options are available on the Dimension tab for any dimension that refers to at least one arc, circle, or cylinder.