You can scroll horizontally to move back and forth along
the timeline. This is done either by holding the shift key
and using the scroll wheel, or (on Mac) by swiping with
two fingers left and right on the track pad.
You can click and drag vertically on the timeline to zoom
in and out.
If you click and drag horizontally, then it scrolls the
timeline left and right
In this example clicking amd dragging anywhere on the
bottom half of the timeline, or anywhere on the waveform
will do the move and zoom behavior