In order to attach images to products, you must first enable the setting.

1. Navigate to Admin > Inventory - Preferences.
2. Check the Enable Photos on Products box.
3. Click Save.

You can then add photos to products as follows.

1. Navigate to the Inventory tab.
2. Edit an existing product or add a new one.
3. Scroll down to the PRODUCT PHOTOS section.
4. Click Upload Photos.
5. Drag and drop one or more image files into the dotted line box, or click inside the dotted line box and select the desired files.
6. Click Upload.
7. Click OK on the notification dialog. The page will refresh shortly thereafter and you should see the image(s) you uploaded.

Note: Images must have either a .jpg or .png file extension. It will not work with a .jpeg extension, but just change the extension to .jpg and you can then upload it.