- Log in your administrator panel and click on the Promotions link in the CATALOG side box.
- Enter the name of the promotion into the input field in the Promotion column in the Add new promotion form and click on the Add new button.
- Click on the details button of the promotion.
- Open the Conditions tab.
- Select Purchased products in the Condition column of the Add conditions form.
- Enter the condition name in the Condition name column.
- Click on the Hide/show product search section link of this condition, find and add the product1 product.
- Click on the Add new button.
- Add a new condition in the same way and add the product2 product to it.
- Click on the Update button.
- Open the Actions tab.
- Enter the desired value of the discount next to Discount on order, select Percent(%) (for instance).
- Select the check box in the Avail. column.
- Click on the Update button.
- Open the Condition rules tab.
- Select the first condition in the first select box and select Add new condition in the second select box.
- Click on the + button and select the second condition in a new select box.
- Click on the Save condition rules button.