Adobe Photoshop CC 2014 v.14.xx - Manual (Page 725)

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Move Layer In Point To Current Time
Move Layer End Point To Current Time
Trim Layer Start To Current Time
Trim Layer End To Current Time
Note:
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Trim or move a video layer
To hide frames at the start or end of a video or animation layer, trim the layer. To start or end video at a different time point, move the video layer.
If you move video layers, changes become permanent when you save the file. If you trim video, however, you can restore it by re-extending the
ends of the layer duration bar.
1. In the Timeline (CC, CS6), Animation (CS5), or Layers panel, select the layer you want to edit.
2. Move the current-time indicator to the frame (or time) you want as the new In point or Out point.
3. From the Timeline (CC, CS6) or Animation (CS5) panel menu, choose one of the following options:
Permanently moves the start of the layer to the current-time indicator.
Permanently moves the end of the layer to the current-time indicator.
Temporarily hides section from the current-time indicator to the start of the layer.
Temporarily hides section from the current-time indicator to the end of the layer.
You can also use the Lift Work Area command to hide frames in one or more layers, or the Extract Work Area command to hide a specific
duration in all layers of a video or animation.
Lift work area
A section of the footage in selected layers can be deleted, leaving a gap of the same duration as the removed section.
1. Select the layers you want to edit.
2. In the Timeline (CC, CS6) or Animation (CS5) panel, set the work area to specify the duration of the selected layers you want to omit.
3. From the panel menu, choose Lift Work Area.
Layers before applying the Lift Work Area command (Photoshop Extended CS5)
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