title: how to change font size of Google Chart Tooltip
body: <p>How do i change the font size Google Chart Tooltip?
  [ This is what i tried so far: <a href="https://jsfiddle.net/Albion87/ujpv8oep/3/" rel="nofollow noreferrer">https://jsfiddle.net/Albion87/ujpv8oep/3/</a> ]
  These are the set options that i have ..</p>
  
  <pre><code>// Set chart options
  var options = {
      isStacked: true,
      tooltip: { textStyle: { fontName: 'verdana', fontSize: 7 } },       
      width: 800,
      height: 600,
      chart: {
          title: 'Year-by-year coffee consumption',
          subtitle: 'This data is not real'
      },      
      vAxis: {
          viewWindow: {
              min: 0,
              max: 100
          }
      },
      legend: { position: 'left', alignment: 'start' },
      series: {
          2: {
              targetAxisIndex: 1
          },
          3: {
              targetAxisIndex: 1
          }
      },
      backgroundColor: {fill: 'transparent'},
      chartArea: {
        backgroundColor: 'transparent'
      }
  };
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/93Lj9.png" rel="nofollow noreferrer">enter image description here</a></p>