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388Final Cut Pro User Guide
6. In the Effects section of the Video inspector, move the pointer over the effect name and
click the Apply Effect Masks button
.
7. Click the pop-up menu that appears and choose Add Shape Mask.
The onscreen controls appear in the viewer, superimposed over the video image. By
default, the shape mask is set to a partially feathered circle in the center of the frame.
The Shape Mask parameter appears in the effect’s section of the Video inspector.
8. Use the onscreen controls to adjust the mask shape.
• Position the shape: Drag the center.
• Adjust the shape’s width or height: Drag any of the four handles at the 90-degree
points (top, bottom, left, or right) of the inner circle. You can hold down the Shift key
while dragging to force all sides to scale proportionally.
• Control the roundness of the shape: Drag the handle to the left of the inner circle’s
top handle.
• Rotate the shape: Drag the rotation handle (extending from the center).
• Control the softness of the shape’s edge: Drag the outer circle. Setting the outer
circle close to the inner circle creates a hard edge and an abrupt visual transition
to the effects you apply, and dragging the outer circle away from the inner circle
creates a softer edge and a more gradual transition.