I am using "Lightbox Plus" plugin to create lightbox image overlay on the top of thumbnail galley. Now my question is how I can set a size for Thumbnails without affecting on the lightbox image overlays. I mean when I try to set a scale for Thumbnails through wp-Gallery edit option it apply the size even to the overlays (I would like to keep the overlay size as big as possible but this function makes them small like Thumbnails size)
I also see this line of code in codex:
`get_the_post_thumbnail($id, array(100,100) ); // Other resolutions`
but I don't know how and where to use it.