How to customize eBay's shipping labels

[cellistics]

I use a different SKU for each item on eBay and put a label on the bag with that sku to make it easier to pull the right items.  I also have eBay print the SKU on the shipping label to ensure the label matches up with the item.

Back in the old days when I used to ship, I created my own custom labels with Shipstation or Dazzle.  I put the SKU at the bottom of the label and had it big and bold so that I could see it easily.  Now that I'm using eBay shipping, it does indeed print the SKU, but it's turned sideways and microscopic.  So small that I can't read it without a magnifying glass which rather defeats the purpose.  Is there any place to edit eBay shipping labels so that I could at least read it easily and accurately and possibly move it to the bottom of the label so that I don't have to turn it sideways to see it?