- track, as visualized by the piano keyboard. Drag the body of the scrollbar up
- and down to display higher or lower pitches.</li>
- <li>Drag the scrollbar handles to zooms in and out and increase and decrease the
- range of visible pitches.</li>
- <li>clicking on the piano plays the corresponding MIDI note for reference.</li>
+ track, as visualized by the piano keyboard. Dragging the body of the scrollbar up
+ and down displays higher or lower pitches.</li>
+ <li>Dragging the scrollbar handles zooms in and out and increases or decreases the
+ range of visible pitches.</li>
+ <li>Double clicking the scrollbar auto-adjusts the zooms to make the range of
+ visible pitches fit the actual content of the track.</li>
+ <li>Clicking on the piano plays the corresponding MIDI note for reference.</li>