In some situations it is necessary to show the first frame of the next video without starting the playout itself. This function is called "cueing" and can be achieved by defining a "Finished Action" which executes this automatically. In case the video clip is already loaded to the timeline, but the playout has not started yet, you can cue the first frame by holding down the commandkey while pressing the playbutton. This cues the first frame of the video. To start the playout, the play button has to be clicked a second time without holding down any key.