title: Reset / Set ZoomType Control in Highstock
body: <p>I am using highcharts api to develop charts in my application. I am using highstack class from highcharts.</p>
  
  <p>What I am looking is I want handle the zoom controls from external buttons.</p>
  
  <p>for example there is a radio button like zoom (yes, no), if we select yes then zoom functionality should be enable in my chart. If no selected then zoom functionality should be disabled.</p>
  
  <p>I have tried with following property:</p>
  
  <p>zoomType: 'xy'</p>
  
  <p>I have tried to reset the above property, but failed.</p>
  
  <p>Please give me any suggestion to fix this issue.</p>
  
  <p>Thanks in advance..</p>