Using frame blending

Use the Frame Blending switch  when motion already exists in the source footage for a layer, such as live-action video. You can apply frame blending to a sequence of still images, but not to a single still image. If you are animating a layer--for example, moving a layer of type across the screen--use the motion blur switch. (See About motion blur.)

Frame blending slows previewing and rendering. To speed things up, you can apply frame blending without using it to redraw or render. The Quality setting you select also affects frame blending. When the layer is set to Best quality, frame blending results in smoother motion but may take longer to render than when set to Draft quality. You can also enable frame blending for all compositions when you render a movie. (See "Changing render settings" on page 687.)

To apply frame blending to a layer:

Select the layer in the Timeline window and choose Layer > Switches > Frame Blending.

A check mark by the Frame Blending command indicates that it is applied to the selected layer. Also, the Frame Blending switch  appears in the Switches column for the layer in the Timeline window. Remove frame blending either by clicking the Frame Blending switch or by choosing the Frame Blending command again.

To enable or disable Frame Blending for redraw and rendering:

Select Enable Frame Blending from the Timeline window Options menu, or click the Enable Frame Blending button  at the top of the Timeline window.