You can use your Royal Mail PPI images with Selro for your eBay,Amazon and Magento orders. Please follow below steps.
a) Please go into your eBay Shipping Options under Settings -> eBay -> Shipping.
b) Select the shipping option that you would like to add Royal Mail PPI images.
c) Click 'Update' under 'Royal Mail PPI' heading in your shipping method.
d) This will bring up a window to upload the PPI image for that shipping option. Sample screen is shown below.