First, a visitor registers on the website as a shopper (signs up as a Registered Shopper).
Next, in the Site Manager, click the
link (under the Shoppers column),

then click
, then click on the registered account. This
will bring up the registered visitor's account.
In an area called
, change the type from
to
. (Yellow is the SMC
term for sub-wholesellers.)

Then click
.
Note: This technique can also be used to add a Shopper Discount to a registered shopper instead of Retail or Yellow. When adding a Shopper Discount, keep in mind that price promotions and coupon promotions will stack with the Shopper Discount.
Quick Reference
Person signs up on site
Shoppers -> All Registered Shoppers -> shopper account -> Price Quote Type, change to Yellow