How to Manage Content Types I am trying to add custom fields for a Quiz Component (Multiple Choice Question). However, when I go to Home>Admin>Structure>Content types, the only types that appear are Article, Basic page and Quiz (non of the components). I can add my own content type but cannot seem to get the already existing content types to appear in this menu. 

In short, how do I control what content appears on this menu.

Thanks for your help and sorry for the noob question. Just getting started out.
The admin/structure/types page lists all the content types implemented by modules, or the content type you created.
In the case of the Quiz module, there are content types created from sub-modules, such as the Short Answer module, all listed under the Quiz Question package. Once you enable the modules you need, you will see extra content types, on admin/structure/types.