Circle effect

The Circle effect creates a customizable solid disk or ring.

This effect works with 8-bpc color.

Edge
None creates a solid disk. The other options all create rings. Each option corresponds to a different set of properties that determine the shape and edge treatment of the ring:
Edge Radius
The difference between the Edge Radius property and the Radius property is the thickness of the ring.

Thickness
The Thickness property sets the thickness of the ring.

Thickness * Radius
The product of the Thickness property and the Radius property is the thickness of the ring.

Thickness & Feather * Radius
The product of the Thickness property and the Radius property is the thickness of the ring. The product of the Feather property and the Radius property is the feather of the ring.

Feather
The thickness of the feather.

Invert Circle
Inverts the matte.

Blending Mode
The blending mode used to combine the shape and the original layer. These blending modes behave like the blending modes in the Timeline panel, except for None, which displays only the shape, without the original layer.