I can remember that (at some time) there was a box display (LightBox? GrayBox? ThickBox?) for displaying images when clicking on them.
I want the image to appear in a *box I click on it, with "next" and "prev" buttons to navigate through the gallery. The images are included with the
[gallery] tag, by the way.
How can I achieve this? Is this a (non) feature of my theme? Or a WordPress feature? Or do I need a plugin?