Tweening the position and opacity of layers

To finish the animation sequence, you'll add frames that represent transitional image states between the two existing frames. When you change the position, opacity, or effects of any layer between two animation frames, you can instruct ImageReady to tween, or automatically create intermediate frames.

1 In the Animation palette, make sure that frame 1 is selected; then choose Tween from the palette menu.

2 In the Tween dialog box, set the following options (if they are not already selected):

• On the Tween With pop-up menu, select Next Frame.

• Under Layers, select All Layers.

• Under Parameters, select the Position and Opacity check boxes. (You can also select Effects to vary the settings of layer effects evenly between the beginning and ending frames. You won't choose this option now because you have not applied any layer effects.)

• Click OK to close the dialog box.

ImageReady creates four new transitional frames, based on the opacity and position settings of the layers in the original two frames.

Tween With: | Next Frame ; | I 0K jjTS Frames to Add: | I Cancel "|

Tween With: | Next Frame ; | I 0K jjTS Frames to Add: | I Cancel "|

3 On the Looping pop-up menu in the lower left of the Animation palette, choose Once.

In the Animation palette, click the Play button (>) to preview your animation in ImageReady.

For the Web: Tweening frames

You use the Tween command to automatically add or modify a series of frames between two existing frames—varying the layer attributes (position, opacity, or effect parameters) evenly between the new frames to create the appearance of movement. For example, if you want to fade out a layer, set the opacity of the layer in the starting frame to 100%; then set the opacity of the same layer in the ending frame to 0%. When you tween between the two frames, the opacity of the layer is reduced evenly across the new frames.

The term "tweening" is derived from "in betweening," the traditional animation term used to describe this process. Tweening significantly reduces the time required to create animation effects such as fading in or fading out, or moving an element across a frame. You can edit tweened frames individually after you create them.

If you select a single frame, you choose whether to tween the frame with the previous frame or the next frame. If you select two contiguous frames, new frames are added between the frames. If you select more than two frames, existing frames between the first and last selected frames are altered by the tweening operation. If you select the first and last frames in an animation, these frames are treated as contiguous, and tweened frames are added after the last frame. (This tweening method is useful when the animation is set to loop multiple times.)

Note: You cannot select discontiguous frames for tweening. -From Adobe Photoshop 7.0 online Help

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