Dimension with Reference Line/Simple Dimension
In the addition to a Radius or Diameter dimension, you can select the use of a dimension with a reference line. You can change the setting during dimensioning.
 Simple dimension Simple dimension 
 Dimension with a reference
          line Dimension with a reference
          line 
Deleting a Reference Line in a Dimension
You can remove the reference line in a dimension using the handle function. The dimension is changed into a simple dimension.
- Select the reference line.
- Select the context-sensitive function Delete Reference Line.
         
You can also restore a reference line using the handle function.
