You can also speed up and slow down the speed of your Motion Tween.
To speed up, remove frames, to slow down, add more frames.
You can also make the shape accelerate or decelerate .
Make sure you have selected your Motion Tween, then change the Ease , located in the Property Bar at the bottom of the screen. Set it at -100. Your shape now starts slowly and speeds up. Try it at 100. What happens?
Edit the Ease of your Motion Tween here. Can’t see it? Click the Small arrow shown in the box below to display your Property Bar.