Your customers can save their designs by using the "Save Design" button. Designs will be saved in the cache and will be available to the users as long as they do not clean the cache and stay on the same device from which they saved the design.
If you require your customers to create an account on your website in order to use the customizer, the design will be saved in his account and in the merchant's Zakeke back office and you can access those designs from the Customer saved designs section.
Designs are saved by customer ID or email, depending on the e-commerce platform. Also you can search for designs by tags.
Saved designs can be edited by you by clicking on the edit button (pencil symbol). Once you edit a design, your customer will find the edited design in his/her gallery on the customizer UI.