> Record
> Click the red record button to display the countdown window and begin recording.
> When you have finished recording, video and audio sources are combined to maintain video/audio sync. Desktop video is combined with computer audio and camera video is combined with microphone audio. You can separate these clips using the Edit > Detach Audio command.
> The only limitation on the length of your recording is the amount of space available on your hard drive. ScreenFlow automatically stops recording when you have less than 100 MB free on your system disk volume.