You can add a reference image to the product while configuring the product. 

To upload product image

  1. Go to ADMIN SETUP > Product Administration > Products
  2. Search for the product you want to add a picture.
  3. Click the product name and click Edit on the details page or click the ellipsis icon  next to the product name and click Edit. The Product Details page is displayed.
  4. Drag any image from your local storage to the image profile box or click the Upload button and double click the image from your local storage that you want to upload.
  5. Click Save.
  6. You can click the preview button on the image to get a full view of the image.
  7. You can delete the picture by hovering over the picture and clicking Delete in Edit mode. Click Save.