A horizontal rubberband that controls the speed of the clip appears across the center of the clip. The clip is shaded in contrasting colors above and below the 100% speed demarcation. A white speed-control track appears in the upper portion of the clip, just below the clip title bar.


Drag the rubberband on either side of the speed keyframe up or down to increase or decrease the playback speed of that portion. (Optional) Press Shift while dragging to limit the speed change values to 5% increments.
Shift-drag the speed keyframe to the left or right to change the speed of the portion to the left of the speed keyframe.
Both the speed and duration of the segment change. Speeding up a segment of a clip makes the segment shorter, and slowing down a segment makes it longer.
A gray area appears between the halves of the speed keyframe, indicating the length of the speed transition. The rubberband forms a ramp between the two halves, indicating a gradual change in speed occurring between them. A blue curve control appears in the gray area.

The change of speed eases in or eases out according to the curvature of the speed ramp.
