Tks for your info. I will try to follow your instruction.
Btw, I just find other issue which I can not find the way to solve it.
There is little space under “copyright” in the footer section for cart/checkout page. Advise me how to let it disappear or disable. FYI, I only show cooywrites in the cart/checkout page. I did not let it show in other pages which did not have this kind of little space issue.