First, an image needs to be associated with the new food. You can drag a similar food from the table to the blue picture area; a copy of the image will appear as well as its nutritional values (this way you may only need to alter a few nutritional values). Another method is to click on the "Get Image" button to select the image from a preset list. However, with this method, your nutritional data is blank and will need to be filled in manually.