To access Creatus Posts Options please go to Appearance > Theme Settings and locate the Posts tab in the left side vertical menu. Posts options will help you setup your website post, posts archive and single post look and feel. This section is split in to 3 main tabs.
Post sub tab contains options that will help you control your blog posts layout and feel and it is split in to sub tabs.
Portfolio sub tab contains options that will help you controll your portfolio projects layout and feel and it is split in to sub tabs.