1. Log into the Zen Cart administrative control panel

2. Go to "Catalog -> Categories/Products"

3. Click on the folder of your product category or create a new category. It is recommended that every product be placed within a category.

4. Now you can add a new product or edit the data for an existing product as shown below...

5. In the product edit page ...

6. Click the Preview button (as shown above).

7. And then you have to click the Update button in order for the changes to take effect. (see picture below).

8. To delete an item from your store, click the red X shown below...

And confirm your intention by clicking delete to the below prompt...