Changing speed with the Rate Stretch tool

1. Open 12-2.prproj
2. Select the Rate Stretch tool in the Tools panel
3. Move the Rate Stretch tool over the right edge of the 1st clip and drag it until it meets the 2nd clip
4. Move the Rate Stretch tool over the right edge of the 2nd clip and drag it until it meets the 3rd clip
5. Play the Timeline