When trying to understand templating and the placement of parts in Orchard CMS, you will encounter the notion of "Display Types." By looking at examples, one quickly gets a sense of what these values are, and they are partially documented on the official documentation site. I wanted a comprehensive list of possible values, so I searched the code and found only four:
Each content item has two types of templates: editor templates and display templates. Display types with the "Admin" suffix target the editor templates the others target the display templates. Similarly there are two contexts for each content item: detail and summary. A content item is rendered as "summary" in both lists and projections as well as other modules that might aggregate content (like the sockets and connectors module).