This demo illustrates the capability to show legend check boxes, which are used to toggle the visibility of various chart elements. Note that when you disable a series check box, the corresponding series trend is automatically disabled as well.
In the demo, you can change legend marker appearance. For this, select the desired marker type in the "Legend Marker Mode" drop-down list. You can also deactivate check boxes for certain elements – e.g., disable the "Checkable Indicators" option to show markers instead of check boxes for financial indicators.