The Control Circle tab of the Control dialog can be used to fine tune the circle.

On this tab you can inspect the circle for each of the 5 canvases.  Switch between canvases by using the canvas tabs at the top. 

When you have made changes, use the Apply button before you switch to a different canvas.

You can -

• Move the control
  You can move the control at 5/100 mm steps by using the arrow buttons below the map excerpt.
  If the controls are locked, the arrow buttons are inactive.  You can then use the "Temporarily unlock" button to override the lock.
• Cut out parts of the circle that cover for important map details
  The circle is split in 36 "slices".  You can toggle off each of these slices.  Just click inside a slice to toggle off or on the corresponding segment of the circle.
  Note that cutting may be "linked" between canvases.  There is a setting in Setup Controls dialog that controls the linking.
• Set the circle color and circle dimensions
  At the right in the dialog, you can configure specific settings for the circle color and circle outline dimensions.  These settings override the common circle color and dimensions settings for the canvas. 
  Use these settings only if you want to override the color or outline settings for individual controls. Circle and number outlines can be configured for all controls on the canvas by using Canvas / Course overprint symbols and dimensions (Additional Dimensions and Fonts).
• Draw a dot at the center of the circle
  Set this option to "Always" to draw a dot at the center of this circle always, on all courses and canvases.  This allows you to draw dots in those control circles where it is relevant, independently of other controls.
  The default setting is to "Use the relevant course's setting".  When this option is selected, you can configure in the Course Dialog for a given course that all controls on that course have dots in their circles, but only when that course is drawn.  Alternatively, you can configure in the Event Dialog that all controls in the entire event have dots in their control circles.

Use the Apply button to save the circle settings without leaving the Control dialog.

Use the Attack Angles button to show you the combined set of attack angles for all the courses.  The red "arrows" indicate the direction of courses coming in to the control; the blue "arrows" indicate the exit directions.