[AudioCrossFades]
The illustrations represent the change in volume in the area where the audio cross fade has been applied.
[Cut out/in]
[Cut out/Spline in]
[Cut out/Linear in]
[Spline out/Cut in]
[Spline out/in]
[Linear out/Cut in]
[Linear out/in]
This is set as the default audio cross fade in the initial settings.