Insert a Picture in a Chart 
1. Click the chart area of the chart.
*This displays the Chart Tools, adding the Design, Layout, and Format tabs.
2. On the Layout tab, in the Insert group, click Picture.
3. Locate the picture that you want to insert, and then double-click it.
*Tip: To add multiple pictures, hold down CTRL while you click the pictures that you want to insert, and then click Insert.
4. To change the size of the picture, drag a sizing handle (sizing handle: One of the small circles or squares that appears at the corners and sides of a selected object. You drag these handles to change the size of the object.) away from or toward the center of the picture while doing one of the following:
* To keep the center of the picture in the same place, hold down CTRL while you drag the sizing handle.
* To maintain the proportions of the picture, hold down SHIFT while you drag the sizing handle.
* To both keep the center of a picture in the same place and maintain its proportions, hold down CTRL+SHIFT while you drag the sizing handle.
Tip: You can also resize a picture to an exact height and width by selecting the picture and then entering the size that you want in the Shape Height and Shape Width boxes (Format tab, Size group).
5. To move the picture, drag it to the location that you want.
Note Pictures that you insert in your chart are embedded in your chart and therefore increase the file size. To reduce the file size, you can link to a picture instead of inserting it. In the Insert Picture dialog box, click the picture that you want to insert, click the arrow next to Insert, and then click Link to File.