No, once an order has been processed, it is not possible to change the font or design. This is because your order enters a production queue with all the details you selected. The system is programmed to use your exact choices, and production begins based on these selections. Changes cannot be made even for a change of mind.
We strongly recommend taking your time when selecting the font, design, and other options to ensure they are exactly as you want. There is a preview window available before adding items to your cart so you can review and confirm your choices.