Adobe AFTER EFFECTS 5.5 Help Manual page 77

Adobe After Effects Help
Using Help | Contents
To move a layer in time by moving its In point:
1 In the Timeline window, drag the current-time marker to the time at which you want
the layer to begin playing.
2 In the Timeline window, right-click (Windows) or Control+click (Mac OS) any panel
heading, and then choose Panels > In.
3 In the In panel, press Alt (Windows) or Option (Mac OS) and click the number that
appears for that layer.
Note: To move a layer by its Out point, use the same steps with the Out point panel.
Automatically arranging layers as a sequence
Use the Sequence Layers keyframe assistant to automatically arrange layers in a sequence.
When you apply the keyframe assistant, the first layer you select remains in its initial time
position, and the other selected layers move to new positions in the Timeline window
based on the order in which you select them.
Layers selected in Timeline window (top). Layers arranged in sequence after applying the Sequence
Layers Keyframe Assistant (bottom).
You can specify whether the layers overlap or are arranged end to end. For overlapping
layers, you determine how long the layers overlap and whether they cut or crossfade from
one to the next. If you specify a crossfade, After Effects creates opacity keyframes that
control how the layers fade into each other.
Overlapping layers can have opacity keyframes set automatically to create a crossfade.
For a layer to be sequenced, its duration must be less than the length of the composition
so that it leaves time for other layers. If you plan to sequence still-image footage that you
haven't imported yet, choose File > Preferences > Import before you import, and specify a
short Still Footage duration. If you've already imported still images that are the length of
the composition, you can trim all of them at once by selecting all of the still image layers,
positioning the current-time marker to set the duration you want them to have, and
pressing Alt+] (Windows) or Option+] (Mac OS).
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Managing Layers
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