Containers

Use the following preferences when working with containers on the timeline.

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Lock Container Effects buttonUse to control how effects associated with segments are processed when you create containers.

Enable to prevent recalculation of multi-layer effects when you move their container. This is useful when containing a composite in which a background is outside the container.
NoteWhen a soft effect is processed, it is locked. If the effect is part of a layered effect and the bottom part is moved, the effect is invalidated, and the result may differ once the effect is unlocked. Also, a locked effect does not display the soft effect quick menu when selected. To unlock the effect, you must either enter the editor, unlock it, or add an additional effect.
Disable to reprocess any effects that have been invalidated or not yet rendered.

Uncontain Options boxUse to determine whether new layers and tracks are overwritten when a container segment is uncontained. See Working with Containers.

Select:	To:
Uncontain & Overwrite	Overwrite segments outside the container on layers and tracks that conflict with the container segments.
Uncontain & Add Tracks	Preserve tracks when you uncontain a container by adding sufficient new layers and tracks to house the previously contained segments. All tracks inside and outside the container are preserved.

Contain Timewarped Edits buttonWhen you perform a fit-to-fill four-point edit, you can enable Contain Timewarped Edits to preserve the edits (including splices and/or transitions) in the incoming clip by containing the incoming clip and applying a timewarp to the container instead of the clip. The result element is a timewarped container, and the container contains the edited incoming clip—all its splices and/or transitions preserved.

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