There
is no direct way to provide a storewide discount, however you can
create a discount coupon to provide to all your customers either through
a newsletter or by placing it on the homepage.
You can create a banner with the discount code that you selected and
place it in your columns or on the home page. You can paste the code to
your home page for your customers usage if you want to advertise the
discount.
The discount will be applied during checkout once a customer enters the code you have displayed.
