Have a video that we decided the user needs to see most of the action for longer. However some segments can stay with the same timing. Need a way to select parts of time for selected tracks and drag the ends to meet beginnings/ends of newly timed elements.
Clip Speed should be able to help. Split the segments requiring different speed. Clip Speed is under Visual Effects, drag to required clip/s open the effects added on the clip and adjust. One way to do this is to drag either end. For multiple tracks all requiring the same speed adjustment, you could try grouping the media first.