What's New: Creo Parametric 4.0 > Detailed Drawings (Detailing) > Improved Dimension Origin Support in Detailed Drawings
  
Improved Dimension Origin Support in Detailed Drawings
Release: Creo Parametric 4.0
Benefits and Description
You can watch a video that demonstrates this capability.
You can set angular dimensions to the Center Leader configuration. You can specify the dimension origin for linear or angular dimensions in a standards-compliant way. Place the pointer on the dimension witness line and right-click to set that side of the dimension to be the origin.