Used to apply an effect where the immediate surroundings of the specified position appear to be focused.
[Center] field
The center of the effect is displayed. The position of the center is specified by dragging the mark, provided in the dialog preview display.
[Radius] field
The radius of the effect is displayed as a number of pixels. The radius is specified by dragging the mark, provided in the dialog preview display.
[Strength] slider
Used to specify the degree of the center focus effect with an integer between 0 and 10.