From the OpenCart Administrator area. Hover over "Catalog" on the menu bar then click "Products"
Complete at least the product name, description and meta tag description would be ideal. Meta tag description will be shown as the short description of the product on a search engine like Google or Yahoo.
On the "Data" tab enter the model number. This needs to be unique across your product range. The Data tab is also the place
Scroll down futher on the Data tab and upload the main image. You can either select from an existing image or upload a new one. Double click the image to select.
Select the category you would like this product to be in. Related products are also selected here.
Additional images can be added on the "Images" tab. This is done in much the same way as the main image.
Once completed click "Save" on the top right. Your product will now be live.