The Source and Program Monitors provide controls to perform three‑point and four‑point edits—standard techniques in traditional video editing.

In a three‑point edit, you mark either two In points and one Out point, or two Out points and one In point. You don’t have to actively set the fourth point; it’s inferred by the other three. For example, in a typical three‑point edit you would specify the starting and ending frames of the source clip (the source In and Out points), and when you want the clip to begin in the sequence (the sequence In point). Where the clip ends in the sequence—the unspecified sequence Out point—is automatically determined by the three points you defined. However, any combination of three points accomplishes an edit. For example, sometimes the point where a clip ends in a sequence is more critical than where it begins. In this case, the three points include source In and Out points, and a sequence Out point. On the other hand, if you need the clip to begin and end at particular points in the sequence—say, perfectly over a line of voice‑over narration—you could set two points in the sequence, and only one point in the source.

In a four‑point edit, you mark source In and Out points and sequence In and Out points. A four‑point edit is useful when the starting and ending frames in both the source clip and sequence are critical. If the marked source and sequence durations are different, Adobe Premiere Pro alerts you to the discrepancy and provides alternatives to resolve it.