Two other techniques commonly used in piano playing are the trill and the tremolo. Both consist of a rapid alternation between two notes. For smaller intervals such as 2nds and 3rds, the term trill is used, and the effect is achieved purely by finger action. With larger intervals such as 6ths and Octaves, the term tremolo is used, and it is achieved with a wrist motion. As with the glissando, it is best to have someone demonstrate these techniques for you. Both take some time to gain control of, so be patient and practice them for a short time each day. The trill and tremolo are indicated by two diagonal lines through the stems of the notes involved. The following example uses these techniques along with the glissando.
Note: In Classical music, there are several variations on the trill (called ornaments). There are specific ways of notating each one. They are best learned with the aid of a teacher.
Here is a Blues piano solo which features glissandi, trills and tremolo. Notice the new left hand pattern here. Practice each hand separately until you are comfortable with both parts.