You can buy an original image and the card (max image size 900 px) without watermarks will be included free of charge.
Boring instructions follow:
1. Find an image you like
2. Type your message in the textbox on the right
3. Use your computer mouse to move this handle to place your message on the image
3. Check out the fonts on the left
4. Click "Preview" to see a prototype of your card. A thumbnail with watermark is used.
5. Click "Finish" when you are happy with your message and placement.
Note: please don't use images with sample texts. Only watermarks will be illiminated