Hi Uurcan,
Thanks for your quick response.
Yes, i have been through the Jot form feature which provides the flexibility to upload images at the time of checkout.
But, using/not using customization engine app in the customization editor itself, is that possible to upload image and drag it on the tshirt/mug to see the preview and customize it with different sizes. Because i believe that this feature counts the customer satisfaction.
Thanks,
kiran