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.
You may also experience the image being "dragged" instead of being magnified.
We recommend that you upload images that are 4000 pixels in the largest dimension. This size accommodates all template choices.
The minimum image size for image uploads is 1200 pixels (px) in the largest dimension.
For more info on Image Sizes, see this FAQ: Image Upload Size
To check the size of your original uploaded image, see this FAQ:
How do I see what size image I uploaded?
To correct a too-small image, you will need to upload a larger image.
See this FAQ: How do I replace an artwork image?