If you want to change the order of the “extra images” for a product, you can do it easily by simply dragging and dropping each one where you want it.
When uploading the first time, we recommend uploading in the order you want the images displayed so they will be in the correct order.
If you realize they need to be rearranged, you can simply save the product (draft or published) and then hover over any image to drag and drop it into the order you prefer.
Then publish your product to make it live!