Adobe AFTER EFFECTS 5.5 Help Manual page 83

Adobe After Effects Help
Using Help | Contents
Moving a trimmed layer in time
After you trim a layer by setting In and Out points, you can adjust the duration position in
two ways that have different results.
Dragging the duration bar If you drag the colored area of the duration bar, the trimmed
footage starts and finishes playing at a different point in time. The length of the play time
and the frames that appear remain unchanged.
Dragging the dimmed outline If you drag the pale rectangle behind the duration bar,
the footage starts and ends at the same point in time as the original position, but different
frames appear. For example, if you drag the pale rectangle to the left, then the In and Out
points shift to later frames in the footage. (This is similar to a "slip edit" in common editing
applications.)
Removing a section of a layer
Remove a portion from the middle of one or more layers from the Timeline using the
following two methods:
Lifting removes a section from the layers and leaves a gap of the same duration as the
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section you remove.
Extracting removes a section from the layers and closes the resulting gap by ripple
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deletion.
To remove a section and leave a gap in time (lift):
1 In the Timeline window, adjust the work area to include only the portion of the layer or
layers that you want to remove:
Move the time marker to the time at which you want the work area to begin and press B
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on your keyboard.
Move the time marker to the point where you want the work area to end, and press N.
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2 Turn on the lock switch ( ) for any layers you do not want affected by the extraction.
3 Choose Edit > Lift Work Area to remove the section from all unlocked layers.
Note: If any layers are selected, this procedure affects only those layers.
To remove a section and close the resulting gap (extracting):
1 Follow steps 1 and 2 of the procedure for lifting (above).
2 Choose Edit > Extract Work Area.
Using markers
Use composition-time and layer-time markers to mark important points in a composition or
in a specific layer. Composition-time markers are numbered, while layer-time markers use
specified text labels. Markers also make it easier to align layers or the current-time marker
with specific points in time: You can snap items to markers when you drag them in the
Timeline window by holding down Shift as you drag.
Layer-time markers can also include a comment, a Web link, or a chapter link. Comments
appear only in the Timeline window. Web links initiate a jump to a Web page in your
browser. Chapter links initiate a jump to a chapter in a QuickTime movie or in other
formats that support chapter marks.
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Managing Layers
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