Category Sub Menu Layout

Hi

I run a cinematography blog at https://www.filmgrab.wordpress.com I am using the Categories as a mean to link films that share Directors or DoP’s.

On my older theme when you selected to view one of the categories you got a list of posts in that category. I changed themes to a nicer layout but now when you select a category you see the whole of each post. My site is image intesive and I would prefer that categories just lead to a page listing the posts within that category.

Is this possible within my current theme?

Thanks for your time!

ME