To add data series to the chart 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.
   
3. The Chart Properties designer appears for the ChartData series. Select the Add button to add a new series to the chart.
   
   A blinking exclamation point appears to warn you that the data needs added to the new series.