All dashboard widgets have Grids associated with them. Accessing the Grid is different for each widget type:
Meter Gauge
Click anywhere on the widget. The Grid contains all of the records selected.
Pie Chart
Click on a section of the pie chart. The Grid contains selected records matching the clicked section.
Line Chart
Click on any data point. The Grid contains results limited to both the clicked line and data point.
Horizontal and Vertical Bar Charts
Click on any bar on the chart. The Grid contains results limited to clicked bar.
Alert Notification
Click on any warning/alert in the list. The Grid contains results from the type of clicked warning.
You may then generate and schedule reports based on the Grid results.