The inset image is a secondary product image that generally appears to the right of the main product image and under the product title. Here are the steps for creating an inset image:

1. Sign into your store and launch the Store Editor.
2. Navigate to a product page.
3. Click "Edit" on the toolbar.
4. Upload an image in the "Inset" property.
5. Click "Update."
6. Remember to click "Publish" from the home page to publish changes to your store.

To change the image size of your inset image, configure the properties "Inset-height" and "Inset-width" in the Variables screen of your Editor.

Important Note: The inset image should not be used when managing your store with the "Rebuild" function of Database upload. (There is a possibility of erasing your inset images.)