When selling from your Le Galeriste Storefront, you can manage your prices using the Manage Price tool under the account icon in the top menu of your portal.
You can create public discounts but you cannot create secret/hidden discounts using promo codes by yourselves. At least; not yet!
We're considering building a tool that'll allow you to do just that. Meanwhile, you can ask us to generate a discount promo code for you.
Just follow the button hereunder to a quick form and we'll email the code back to you as fast as we can (it may take up to two business days). Once we understand how you guys use it, we'll add an app in the portal for this process to be automatic.