User Guide

CHAPTER 4
150
Managing Layers
To show or hide all effects applied to one layer:
Do one of the following:
• In the Timeline window, click the Effect switch icon for a layer to toggle between
showing and hiding effects.
• Select a layer, choose Layer > Switches, and make sure that the Effect command is
selected (to show effects) or deselected (to hide effects).
You can temporarily turn on or off an individual effect applied to a layer. For more infor-
mation, see “Applying and controlling effects” on page 270.
Enhancing time-altered motion by blending frames
When you time-stretch (see “Time-stretching a layer” on page 222) or time-remap (see
“About time-remapping” on page 226) footage to a slower frame rate or to a rate lower
than that of its composition, movement can appear jerky. This jerky appearance results
because the layer now has fewer frames per second than the composition. By default, After
Effects fills in the missing frames in slow-motion footage by repeating the last frame
shown. After Effects can create a more gradual transition between frames by interpolating
new frames between existing ones.
When you time-stretch or time-remap footage to a frame rate that is faster than the
original or higher than that of its composition, After Effects skips many of the original
frames to achieve the new rate and, consequently, movement can appear jerky. Frame
blending combines the remaining original frames to create smoother fast motion.
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. For more information about
motion blur, see online Help.
UG.book Page 150 Wednesday, February 21, 2001 12:05 PM