Working with Markups > Measurements > To Adjust the Display of Measurements
  
To Adjust the Display of Measurements
Change the color of the witness line in the Creo View Options dialog box. Change other aspects of the measurement’s appearance in the graphics area:
To change the distance of the witness line from the measurement end points, drag the witness line to a new location.
To flip the dimension arrows for distance, radiuses, or diameter measurements, drag the leader line outward.
To rotate the projection lines around the minimum distance line, drag one of the projection lines to a new location.
To change the radius of the angle arc, drag it to a new radius.