Creo Simulate > Reference Links > Relative To
  
Relative To
When you select a directional component for a quantity, you can choose the reference direction of the component from the Relative To drop-down list. The reference options available on the Relative To drop-down list vary depending on the quantity.
Use the Relative To drop-down list to display results relative to:
a coordinate system
a coordinate
the material orientation
the ply orientation
the beam orientation
the curve arc length