The Center Mark command adds a center mark based on which of the following placement options is selected on the Center Mark command bar:

• At the center of a curved element, such as a circle or arc

  

• Associative to a point you place, to give the appearance of a center mark in free space

  

• At the midpoint or endpoint of an arc or line

  

You can place an angular dimension to a center mark line or projection line using the Angle Between command and the Horizontal/Vertical Orientation option on the Dimension command bar.

You also can use the Angle Between command to place a dimension to the center mark center point.