A customizable and additional design

How can I make a customizable and additional design from the buyer?

Ahoy @Mostra,

what do you mean? Could you provide a screenshot or give some more details of what you want?
If you upload and publish a design via your partnerarea the customer still has the possibility to add text, scale the design and add some simple additional graphics on our marketplace.

In your shop the customer will find the Designer-tool for even more personalization.
Let me know where I can help.

Best Rico