No full size image for guests. How?

[LALING]

I'd like only registered users to view the full size original image. If the visitor is just a guest, they can ony view the thumbnails. How do I do this?

[Nibbler]

FAQ: How can I let unregistered users see the thumbnails only, but not the actual pictures?

[LALING]

FAQ: How can I let unregistered users see the thumbnails only, but not the actual pictures?

Thanks. I'll check it now.