The priority of the layer in the #GESTimeline. 0 is the highest priority. Conceptually, a timeline is a stack of layers, and the priority of the layer represents its position in the stack. Two layers should not have the same priority within a given GESTimeline.
Note that the timeline needs to be committed (with #ges_timeline_commit) for the change to be taken into account.
Whether to automatically create a #GESTransitionClip whenever two #GESSource-s that both belong to a #GESClip in the layer overlap. See #GESTimeline for what counts as an overlap.
When a layer is added to a #GESTimeline, if this property is left as %FALSE, but the timeline's #GESTimeline:auto-transition is %TRUE, it will be set to %TRUE as well.