Thanks for your reply, mihai-imagely.
But the Auto Thickbox plugin is obsolete.
The question is : what is the plugin that would achieve the desired result ?
I need the previous/next navigation element, as text, or as arrows.
But this element must be outside the image, and it is important that the lightbox does not automatically resize according to the dimensions of the image.
If this is not possible with NextGen, which plugin would open a new HTML page when you click on a thumbnail image, with the photos stored in a folder of my choice and not in wp-content/uploads/year/month ?
