How to create a gallery which look like that in theme preview? http://www.kriesi.at/themedemo/?theme=coalition I tried to use [gallery] shortcode in the page but nothing displays. What code shoud i use for that pretty gallery with lightbox?
If you mean the Gallery in the demo it is using the wordpress inserted gallery. Make sure you have images uploaded and attached to the page before using the gallery shortcode or else it won’t be able to output anything.