Kartris products can have unlimited images. To add an image for a product, click the images tab and then 'Add new'.

Hit 'Browse' and navigate to an image on your local computer. Ideally, this image should be sized already for use as a 'large view' image on your site. Ideally this should be big enough to exploit the space available on large screens (e.g. 1200px or more wide) but compressed to a reasonable size (perhaps couple of hundred KB).

Once selected, click the 'upload' link to the left of the browse box. The image should appear in the list.

The image aspect ratio will be maintained, and it will be reduced in size where necessary for use as various sized thumbnails, normal sized view, and large view.

You can upload multiple images one by one, or you can multi-select in the dialog and upload several at once. They will appear here as a list. The image order can be changed using the up/down buttons, or it can be deleted.

Where there are multiple images, the first will be used for the product on the front end of the site. On the product page itself, the first image will display larger, while the others will be thumbnailed below in a gallery. A large view feature is automatically provided.

If no image is included, a place-holder image may be displayed on the front end instead, depending on the frontend.display.image.products.placeholder config setting.