Zoom In tool. Can be dragged over just the area of the Timeline to fill the window. Very cool. Works in the Canvas and Viewer as well.
Zoom Out tool. Works in the Canvas and Viewer as well.
Scroll left in the Timeline
Scroll right in the Timeline
Show the entire sequence in the Timeline. It also zooms your Canvas or Viewer to fit in the window.
Change track heights
Toggle the waveform display
Toggle clip overlays
Toggle clip keyframes