Sometimes you want to get a closer look at your data. Click the mouse on the magnifying glass with the plus sign on the toolbar. This is the zoom in icon. When you move the mouse pointer onto the chart, notice that it has changed to a magnifying glass. Hold the left mouse button down to choose the area of interest. Release the mouse button and notice that the chart is redrawn to display the selected data. To return the chart to its original state, click on the zoom out icon, the magnifying glass with the negative sign.