> Record Your Display—Then Add Narration
> Using this method, you first record the display (optionally, without computer audio), demonstrating your application or subject matter without any video or voice-over.
> When you have finished your demonstration, you can record your camera and microphone sources while playing the video preview of your demonstration in ScreenFlow. This can be done in a single long recording or several short recordings.
> You can then edit your recordings to align your narration with your demonstration or fade your camera recording in and out when appropriate.
> This workflow is effective when the screencast involves a series of complex mouse or keyboard operations, or you have several comprehensive steps or tasks to achieve, each of which take some effort to produce.