This type of selection creates a crossfade before the splice point. This lets you maintain the volume of the very beginning of clip 2 instead of fading across it, which is useful if there is a strong attack at the beginning of clip 2 that you want to preserve. When making selections for crossfades that occur on the border of two clips, you can use the Tab key to move the cursor to the exact beginning or end of a clip.This crossfade type requires that clip 2 contain audio material before its start point.