# Expand Clickable Area of Chart Points

## Environment

<table>
 <tr>
  <td>Product</td>
  <td>Progress® Kendo UI® Chart for jQuery</td>
 </tr>
 <tr>
  <td>Operating System</td>
  <td>Windows 10 64bit</td>
 </tr>
 <tr>
  <td>Visual Studio Version</td>
  <td>Visual Studio 2017</td>
 </tr>
 <tr>
  <td>Preferred Language</td>
  <td>JavaScript</td>
 </tr>
</table>

## Description

Sometimes the Chart produces series of points that are too small to be reliably clicked or touched. How can I expand these?

## Solution

It is possible to expand the active area by adding a transparent element as part of the [`visual`](https://www.telerik.com/kendo-jquery-ui/documentation/api/dataviz/ui/chart/configuration/series#seriesvisual) configuration.

The following example demonstrates how to achieve this behavior in a Bar Charts series.

```dojo
    <div id="chart"></div>
    <div id="log">Click on the area next to a point...</div>
    <script>
      $("#chart").kendoChart({
        series: [{
          type: "column",
          data: [1, 2, 3],
          visual: function(e) {
            var marker = e.createVisual();
            var group = new kendo.drawing.Group();

            // A transparent rectangle that serves as a touch zone
            var touch = kendo.drawing.Path.fromRect(e.rect, {
              transform: kendo.geometry.transform()
              .scale(1.5, 2, e.rect.center()),

              // Comment the following line to see it
              stroke: null,

              fill: {
                color: "#fff",
                opacity: 0
              }
            });

            group.append(touch, marker);
            return group;
          },
          tooltip: {
            visible: true
          }
        }],
        seriesClick: function(e) {
          $("#log").text("Clicked " + e.value);
        }
      });
    </script>
```

The following example demonstrates how to expand the clickable or touchable area of points in a line series.

```dojo
    <div id="chart"></div>
    <div id="log">Click on the area next to a point...</div>
    <script>
      $("#chart").kendoChart({
        series: [{
          type: "line",
          data: [1, 2, 3],
          markers: {
              visual: function(e) {
                var marker = e.createVisual();
                var group = new kendo.drawing.Group();

                // A transparent rectangle that serves as a touch zone
                var touch = kendo.drawing.Path.fromRect(e.rect, {
                  transform: kendo.geometry.transform()
                  .scale(10, 10, e.rect.center()),

                  // Comment the following line to see it
                  stroke: null,

                  fill: {
                    color: "#fff",
                    opacity: 0
                  }
                });

                group.append(touch, marker);
                return group;
              }
          },
          tooltip: {
            visible: true
          }
        }],
        seriesClick: function(e) {
          $("#log").text("Clicked " + e.value);
        }
      });
    </script>
```

## See Also

* [Chart JavaScript API Reference](https://www.telerik.com/kendo-jquery-ui/documentation/api/dataviz/ui/chart)
* [Drawing API](https://www.telerik.com/kendo-jquery-ui/documentation/framework/drawing/overview)
* [Aggregate Data in Pie Charts](https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/pie-chart-aggregates)
* [Draw on Scatter Plots Surface](https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/draw-on-scatter-plots)
* [Fit PDF Exported Chart to Page](https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/fit-exported-chart-in-pdf)