By default there are spaces for one main image and ten alt (alternative) images per product in Neto. To change the number of images:
From the Neto Dashboard, navigate to Setup & Tools > All Settings & Tools.
Select Webstore from the menu, and choose Image Settings.
Enter the number of images you want per product and save your changes.
This is also where you can set or change the dimensions for the images on the site. The system will re-size or optimise uploaded images based on these settings.