Why edit design button is gone ?

 Why edit design button is gone?

 When you put the designed T-shirt into the cart ready to pay or the order is placed, the design can not be edited. Since re-edit could cause mistake that the printed image is not the one you expected, the situation needs to be avoided. 

If your design has been in the cart, just remove it from the cart and turn back to design page, you will see the edit design button again.