3Drag a distortion handle on the highlighting box.

4Click the Apply button on the extended property bar .

If you want to cancel the transformation, double-click outside the object.

To apply perspective to an object

1Select an object.

2Click the Perspective mode button on the property bar.

3Drag a perspective handle on the highlighting box.

4Click the Apply button on the extended property bar .

If you want to cancel the transformation, double-click outside the object.

Changing the edges of objects

You can adjust the appearance of an object by changing the characteristics of its edges. You can blend the edges of an object with the background by feathering, defringing, and removing black and white edges. To emphasize a certain object in an image, you can define its edges by sharpening them.

Feathering

Feathering softens the edges of an object by gradually increasing the transparency of the edge pixels. You can specify the width of the feathered section of the object and the transparency gradient you want to use.

The object on the right has been feathered to soften its edges.

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Defringing

An object created from an editable area sometimes includes stray pixels along its edges. This is apparent when the editable area is surrounded by pixels of a different brightness or color. Defringing replaces the color of the stray pixels with a color from the object so that the object blends with the background.

Removing black or white object edges

You can remove black or white edges from a feathered object by making pixels along the edges more transparent or more opaque.

Sharpening

Sharpening defines the edges of an object by making the edges crisp. The edges become sharper as the pixels below the threshold become transparent and the pixels within the threshold become opaque.

The object on the right has been sharpened to define its edges and make them more crisp.

Changing the appearance of the object marquee

You can customize the appearance of the object marquee by changing its color and threshold value. Changing the marquee threshold value modifies the location of the visual boundary of the active object. You can also change the color of the object marquee to make it more visible against the image background.

To feather the edges of an object

1 Select an object.

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2Click Object ` Feather.

3Type a value in the Width box.

4From the Edges list box, choose one of the following:

• Linear — changes the edge transparency in even increments from the beginning

to the end of the feathered section

• Curved — results in small transparency increments at the beginning of the feathered edge, larger transparency increments in the middle, and small transparency increments at the end

If you want to view the effect in the image window, click Preview .

To defringe an object

1Select an object.

2Click Object ` Matting ` Defringe.

3Type a value in the Width box.

Higher values create a more gradual transition between the edges of the object and the background.

To remove black or white edges from an object

1Select an object.

2Click Object ` Matting, and click one of the following:

•Remove black matte — makes edge pixels more transparent

•Remove white matte — makes edge pixels more opaque

To sharpen the edges of an object

1Select an object.

2Click Object ` Matting ` Threshold.

3Type a value from 1 to 255 in the Level box. Higher values include fewer semitransparent pixels.

To change the object marquee

1Click Tools ` Options.

2In the Workspace list of categories, click Display.

3Type a value from 1 to 255 in the Object threshold box.

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