FSX Planner allows you to work with up to four background images simultaneously. The purpose of background images in FSX Planner is to help with accurate placement of airport objects by displaying an image from a source such as Google Earth within FSX Planner. This image can be displayed either above or below the airport diagram, allowing you to choose the option that works best for your purposes. Note that the background image is not imported into flight simulator. It is used only within FSX Planner.