Bring your album artwork into your iTunes Storefront file. To do this, save your Album Artwork as a .jpg. To save your album artwork as a .jpg:
- Save your file as you normally would (<---super important!)
- Then go to File>Save As
- Find the "Format" dropdown menu and select "JPEG" and click "Save"
- On the next screen, put the quality at "12"
Creating a .jpg essentially saves your file as a photograph so you can easily bring your artwork into your iTunes Storefront and place it in the top left corner.
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Here are some examples of iTunes Storefronts. Check out how the designers incorporated SIMILAR elements (colors, patterns, shapes, lines, textures, etc.) from the album artwork design into the storefront.