We strongly recommend using one of the existing templates and customizing it for your needs.
If you would rather design your own postcard from scratch, you can skip selecting a template and get started. Bear in mind that while the postcard editor does have several tools built-in to help with creating your own design, there is a good chance that you will need to directly edit the source code in order to fully customize your design. This will require someone on your team to have at least some comfort level with editing HTML and/or CSS.
When designing a custom postcard, it is important to preserve the white space needed for printing, particularly on the back of your postcard, where the mailing address, return address, and bar code will automatically be inserted when your postcard is printed. Use the diagram below as a guide to ensure you allow proper spacing.
Be sure to preview and print your postcard before publishing, to make sure your final design appears exactly the way you'd like.