Adobe AFTER EFFECTS 7.0 - Circle Effect

ADOBE AFTER EFFECTS 7.0
User Guide
447
Width Specifies the horizontal width of the checkerboard pattern. If you choose Width Slider in the Size From menu,
this value determines both the width and height of the checkerboard pattern. If you choose Width & Height Sliders
in the Size From menu, this value determines the width only.
Height Determines the vertical height of the checkerboard squares when you choose Width & Height Sliders in the
Size From menu.
Feather Specifies the size of the edge feather of the checkerboard pattern. Expand this control to reveal the
Width and Height sliders. Set Width and Height values independently, or set them both to the same value for
auniform feather.
Color Specifies the color of one set of the checkerboard squares. The other set of squares is always transparent.
Opacity Specifies the transparency of the checkerboard pattern.
Blending Mode Specifies the blending mode the effect uses to create an interaction between the checkerboard
pattern and the original layer. All of these blending modes work identically to the ones in the Timeline panel, except
the default None mode, which renders the checkerboard pattern only.
Circle effect
The Circle effect creates a customizable solid circle or ring.
This effect works with 8-bpc color.
Original image (left), circle with no edge (center), circle specifying a Thickness & Feather *Radius edge
Adjust the following controls for the Circle effect:
Center Specifies the center point of the circle.
Radius Specifies the size of the radius, in pixels. If you set the radius to be larger than your original source layer, some
or all of the circle’s edge may fall outside the composition frame, depending upon the location of the circle’s center
point.
Edge Specifies the shape and edge treatment of the circle. Depending upon the option, the slider changes its name
to correspond to the option. Choose one of the following options from the menu, and use the slider to adjust the
option:
• None Creates a solid circle.
• Edge Radius Creates a ring. The difference in the values set for this control and Radius determines the ring’s
width.
• Thickness Creates a ring with a specified thickness. The corresponding slider measures the ring thickness in
pixels.
• Thickness * Radius Creates a ring that uses the Radius value to determine the Thickness value. As you increase
the Radius value of the ring, the Thickness value increases proportionally.
• Thickness & Feather * Radius Creates a ring that uses the Radius value to determine both the Thickness and
Feather values. As you increase the Radius value, the Thickness and Feather values scale proportionally.