Default Images display for both Categories and Products if no other image is specified.
You can create a custom Default Image, but if you don't, Quick Shopping Cart®'s Default Image displays for each missing photo.
When uploading an image, we recommend the file be in GIF, JPG, PNG, or BMP format. The optimum file size for images is 100K for thumbnail images, and 500K for standard images. The maximum allowed size is 1 MB for thumbnail and standard images.