title: magento: create a thumbnail image in the csv file
body: <p>I have a webshop with over 1500 products, with some mistake I made I accidentally deleted the base image, small image and the thumbnail. I still have the original images. I have tried to add the image link to the product in the csv file but this doesnt work.</p>
  
  <p>(I first export the csv then I import the changed csv back)</p>
  
  <p>when I made one product how i wanted it, it showed me this:(third picture)</p>
  
  <p><img src="https://i.stack.imgur.com/QrTxn.png" alt="the exported csv file"></p>
  
  <p><img src="https://i.stack.imgur.com/oxq5h.png" alt="this is the search result"></p>
  
  <p><img src="https://i.stack.imgur.com/Cywes.png" alt="correct product image"></p>