Vibrato is controlled with the left hand finger which is fretting the note. As the finger frets the note, move the siring rapidly back and forth in the direction of the adjacent strings. The left hand finger must apply pressure to the fretted note as the vibrato is used. Vibrato is indicated by a wavy line above the tablature number.
Now try Example 64 which features the use of vibrato. This example is played within lead guitar pattern one in the key of A.