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