title: How do you set an initial zoom of a bokeh plot?
body: <p>I have a plot that uses values from the some original data (within an x/y range of 0-20), and some minimization data that results in some fairly large x/y values (e.g. -1000 to 1000+). Because of this, the plots I'm doing require me to manually click zoom to see the relevant portion of just the source data.</p>
  
  <p>Is there a way in bokeh (python/js plotting library) to set the initial zoom? I noticed there's a box-zoom button, but that's still a manual step of clicking and zooming in the area every time.</p>