You can add up to three widgets to the home page's widget panel. To add a widget you can click on it once or you can click on it and drag into any spot. You can replace any widget by dragging a widget from the preview section and dropping it over another widget in your widgets panel.
You can use the Edit link in the widget's header to get access to the widget settings.
You can Refresh content on some widgets manually by clicking the Refresh icon located in the header of a widget.
You can click the 'X' icon in the header of a widget to remove it from your widget panel.