In Focus or main view, you can quickly show a chart for any item on the screen. Just select the item and click F11 (the chart shortcut key in Excel), or click the small bar chart icon at the bottom right of each item.

You can show as many charts at a time as you like. 

If you move the mouse over a chart, you will see the numerical values appear.

To remove a chart, click the bar chart icon again. 

Note that you must already have created the preview (e.g. by clicking F9) because this calculates the results that are displayed in the charts.