Here you can set the size for loading Photo CD images.
You can choose between Base / 16, Base / 4, Base, Base * 4, Base * 16 and Base * 64.
These formats are placeholders for pixel sizes and go from Base / 16 (128 x 192 pixel) to Base * 16 (2048 x 3072 pixel). Pay attention, that Base * 16 need already more than 18 MB memory.
The Base * 64 is used for commercial purposes and not available on all Photo CDs. An image in this format needs 72 MB memory.