Your customers can save their designs by using the "Save Design" button.
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/her account and in your Zakeke back-office (and you can access those designs). You can access those designs from the Customer saved designs section.
If you do not require users to create an account to access your store, the designs get saved in the cache and they 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.
Customer saved designs
Designs are saved by customer ID or email, depending on the e-commerce platform. Also, you can search them by tags.
Saved designs can be edited by you by clicking on the edit button (pencil symbol). Once you've edited a design, your customer will find the edited design in his/her gallery on the customizer UI.