To modify the appearance of the chart data using the C1Chart floating toolbar, complete the following steps:

1. Select the C1Chart control and click on the Open button to open the C1Chart floating toolbar if it is not already open.
2. Select the Data drop-down arrow from the C1Chart floating toolbar and choose the Edit data series item.
   
   The Chart Properties designer appears for the data series.
3. With the Series0 selected, click on the drop-down arrow for the Color Generation and select a color theme, Metro, for example:
   
   The color theme applies to all data series.
4. Select OK and the changes appear on the chart.