How can I create a coupon to apply to only a certain catagory of products?

I have a website where there are products by myself but I also carry other designers as well and up till now I have had coupons that worked fine in the store but now that I am carrying another designers products as well I need to find out if and/or how I can set up a coupon that would only apply to the products on one specific designers? Now there are separate categories for each designer and I read somewhere that you can set coupons for a specific category but it did not go on to say how. I have the new 1.3.9v of zencart and the site is http://www.crazy-4-monograms.com/store
Thankyou in advance!
Misty

Create the Discount Coupon ...

Once made, you will see on the right panel the RESTRICTIONS button ...

First, do set a:
TOP DENY

then, set the Categories that are allowed ...

The Discount Coupon will work with the Products that use the Categories set as their master_categories_id ...

Thankyou! That is precisely what I needed to know and I have now set up the coupon to do what I needed you are wonderful! Thankyou

Thanks for the update that you were able to use the Discount Coupon Restrictions to work with your site ... :smile: