precompose()

Creates a new CompItem object and moves the specified layers into its layer collection. It removes the individual layers from this collection, and adds the

displayStartTime

The time set as the beginning of the composition, in seconds. This is the equivalent of the Start Timecode or Start Frame setting in the Composition Setting

timeDisplayType

The time display style, corresponding to the Time Display Style section in the Project Settings dialog box.A TimeDisplayType enumerated value; read/write. O

speed

The speed value of the keyframe. The units depend on the type of keyframe, and are displayed in the KeyframeVelocity dialog box.Floating-point value; read/w

dropFrame

When true, indicates that the composition uses drop-frame timecode. When false, indicates non-drop-frame timecode. This corresponds to the setting in the Co