Manually add center marks
  1. On the ribbon, click Annotate tab Symbols panel Center Mark .
  2. In the graphics window, click a feature to place a center mark.

    For sheet metal punches, right-click and select or clear the check box on Punch Centers to change priority.

  3. Continue selecting features to place center marks.
  4. Right-click, and then select Cancel to terminate the operation.
Parent topic: Centerlines and Center Marks