Tutorial:I see a red line when I drag a clip into a timeline

From Adobe Premiere Pro

• I see a red line when I drag a clip into a timeline in Premiere. Why is it there?

That red line lets you know that there is a time or sample gap in your timeline. When you drag a clip to place it adjacent to another clip, Adobe® Premiere® Pro 1.5 displays a red snap-line if the clip is not perfectly aligned to the edge of the destination clip.

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