If your image is not enlarging to accommodate the size of the large Zoom View, it is most likely due to uploading a small image. An image will never zoom larger than your original uploaded size.
We recommend that you upload images that are at least 1200 pixels on the longer side.
For more info on Image Sizes, see this FAQ: Image Upload Size
To check the size of your original uploaded image:
Using Firefox (easier in this case):
To correct a too-small image, you will need to upload a larger image. See this FAQ: How do I replace an artwork image?
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