The Clip Gain Line lets you edit the clip gain settings for any given clip using breakpoint editing, much like with track-based volume automation. However, unlike track-based volume automation, the clip gain settings are always associated with the clip rather than with the track. The Clip Gain Line can be shown or hidden for all clips in the Edit window.
Clip gain is applied on a clip-by-clip basis. When cross-fading between clips, the Clip Gain Line for the first clip carries through the fade out segment of the crossfade and the Clip Gain Line for the second clip carries through the fade in segment of the crossfade. Consequently, crossfades can display two Clip Gain Lines, one for the first clip and one for the second clip.