The chart control contains a collection of areas which each contain a collection of series. A single legend will combine all the series from all the areas in one place. Here, 2 areas are used to display 2 series. A legend can be moved around, resized, and docked. Please note that a legend can be resized only when its Dock property is set to Float and if the AllowResize property is set to true. This feature is only available in the "Plus" version. Click here for more details about Xceed Toolkit Plus for WPF.