1. Navigate to Administration -> Shippers
2. Click on the 'Packing Slips' tab at the top right of your screen, choose a Sales Channel and click 'Go'
3. Enter a logo, packing slip message and any other custom settings for your selected storefront
4. Click 'Save' to save your changes. Once saved, you can select a different Sales Channel from the drop down at the top of the screen, click 'Go', and adjust your packing slip settings for other Sales Channels.