There is an upper size limit in the Design Studio of 10mb. Anything over that and the Design Studio will show an error message.
It is not, however, recommended that you upload JPG only files anywhere near this as processing will be slowed considerably leading to poor performance whilst drawing the framed image. It is better to resize your image to a more manageable size. We suggest less then 500kb but the smaller the better.
There are many freeware utilities on the market that will provide this re-sizing capability for you. We recommend IrfanView which is one of the most popular image viewers and editors available, but you will find many more in Wikipedia
File Type
If your image is less than 10mb and still won't load, then it is possible that the image you are uploading is not the popular JPG type, which is the only one supported by the Design Studio.
Speed of Upload
Most internet connections, even the apparently "fast" 8mb download ADSL type, are quite slow at uploading files. For example, it is not unusual for an 8mb connection to have a download speed of 3mb and an upload speed of 40kb - considerably slower. This can sometimes give the appearance that the upload has stalled.
Image Printing
Image upload is for convenient preview of your image in a frame. We do not provide a printing service.