to set up a blur effect:1 choose the type of effect you are looking for in the directory.
2 click the particular effect you want from the effect list.
3 to see a preview of your effect at any time, click the preview button.
4 if your clip contains an alpha channel, you can change the alpha-key color that is used to blend your blurred clip with the underlying (background) clip. to do this, select allow changes, then click the
button beside alpha-key blending color to select the color you want.5 to adjust the softness on the border of your clip, drag the softness slider, or enter a value in the text box.
6 if you want to apply custom settings to your effect, see "creating a custom blur effect" on page 88.
7 if you want to apply or change various transform settings, such as to change your clip's size, position, and rotation settings, see "transforming your clip" on page 123.
8 when you are satisfied with your effect, click ok to return to your timeline.