title: How do I create a zoom slider for a bokeh animation?
body: <p>I want to have slider widget to zoom in and out of a bokeh animation. The slider should zoom to a specific point in the figure (for example (100,123)) and have a maximum and minimum zoom level.
  I am using curdoc() and bokeh server.</p>
  
  <p>I was wondering how someone with more experience would do that.</p>
  
  <p>thanks</p>