How to make layout for particular content type with Panels module?

Hi,
can anyone tell me how to make layout in panels module that should be applied to every article (node) of particular content type. Just to make this clear: I don't mean to make layout, and then put in it content picked by views module. I just want to say Drupal 7: apply that layout to every node of that content type.
I do not now if I am clear. For example, if I have content type named "News", every article of that content type has it's own node. But, since I don't want to make layout for every node individually, although I want them stylized in same way, I ask how to make specific layout that would be applied automatically for every new article of that type, News, when I open it.
Thanks in advance!