title: amCharts 4 - valueAxis Tooltip Precision Too Low
body: <p>See <a href="https://codepen.io/anon/pen/yrKJNd" rel="nofollow noreferrer">this pen</a>.  The valueAxis has a maxPrecision of 8 and number formatting to allow 8 significant digits:</p>
  
  <pre><code>valueAxis.maxPrecision = 8;
  valueAxis.numberFormatter = new am4core.NumberFormatter();
  valueAxis.numberFormatter.numberFormat = '0.00000000';
  </code></pre>
  
  <p>However, the valueAxis tooltip only seems to show 4 significant digits.  The data has 6.</p>
  
  <p>How can I set the valueAxis tooltip to have a precision of at least 6?</p>