Or are you looking for something that provides multiple thumbnails, like small/medium/full size?

Something like that. Maybe when i click on a thumbnail it displays a 300x300 px image.

Here is an entry at my blog using the lightbox+ plugin:
http://ffaat.pointclark.net/blog/archives/127-Ice ...

Or are you looking for something that provides multiple thumbnails, like small/medium/full size?

Something like that. Maybe when i click on a thumbnail it displays a 300x300 px image.

Its probably a dumb question but here it goes;
I´m a photographer and i´ve got many photos with high resolution ( some of them with 3456 x 2304 pixels ) and i need a plugin with displays a thumbnail ( about 400x400px ). i´ve search for that kind of plugin but i´m not sure what it is or how it works ...