If I remember well, Graphene has a built-in lightbox function for displaying pictures. But this is not working on my blog anymore like it used to. I’m not sure, but I think it stopped working with an update of Graphene or WordPress.
Prasanna is correct, the theme does not include any built-in lightbox function. You would need to install a plugin for that. I would recommend using lightbox plugins that are using jQuery instead of sriptaculous. That way, there’ll be less scripts for your users to download, and less chances of script conflicts.
This free Support Forum relies on contributions from our support staffs and fellow Graphene themes users. While we endeavour to provide adequate and timely support, due to its voluntary nature responses are not guaranteed and may be delayed.
If you require urgent assistance, you may like to consider our Priority Support option.