Follow these steps to add or remove a logo a banner from your auction page.
For the best looking results, keep the sizes within:
Logos - should not be smaller then 100X100
Banners - Should not be larger then 980X200
1) Click "Auctions" on the far left > Click on "Manage Auctions".
2) Click on the Name of your auction.
3) Click "Design Auction".
4) Click the Upload Logo/Banner link, and select your file.