Filters, which give instances special effects such as blurs and drop shadows, can also be animated. You’ll next refine the motion tween of the actors by applying a blur filter to one of them to make it appear as if the camera changes focus. Animating filters is no different from animating changes in position or changes in color effect. You simply set the values for a filter at one keyframe and set different values for the filter at another keyframe, and Animate creates a smooth transition.
Make sure that the actors layer folder on the timeline is visible.
Unlock the woman layer.
Move the playhead to the beginning keyframe of the motion tween in the woman layer, at frame 23.
Select the instance of the woman on the Stage. You won’t be able to see her because she has an alpha value of 0% (totally transparent). Click the upper-right side of the Stage to select the transparent instance. Or click frame 23 in the woman layer in the timeline to highlight it, then click the Object tab in the Properties panel.
In the Properties panel, click the Add Filter (+) button in the Filters section, and choose Blur from the menu to add a blur to the instance.
In the Filters section of the Properties panel, select the link icon to apply equal values to the x and y directions if it isn’t already selected. Set the Blur X value to 20 pixels.
The Blur Y value also changes to 20 pixels.
Move the playhead along the entire timeline to preview the animation.
The woman instance is blurred throughout the motion tween.
Select frame 140 in the woman layer and choose Insert Keyframe above the timeline.
Animate establishes a keyframe at frame 140.
Select frame 160 of the woman layer and choose Insert Keyframe above the timeline to add another keyframe.
Select the Object tab of the Properties panel.
In the Properties panel, change the value of the Blur filter to X=0 and Y=0.
The Blur filter changes from the keyframe at frame 140 to the keyframe at 160. Animate creates a smooth transition from a blurry instance to an in-focus instance.