If you're talking about vibrato:
1. Ensure you're in mode 2
2. Select the note you want to add vibrato to
3. Right click the note and select "pitch"
4. Check "Vibrato"
5. Click OK
6. You'll get this little wavy line on the note, and below it there will be an object. By grabbing the two handles on the below object, you can manipulate the speed and intensity of the vibrato.