Managing documentation together with source code

You can manage your documentation files in the same way as the other files of your projects.
Documentation files, like all other project files, are associated with a file type. The file type describes the various attributes of files of a particular type, including where these files are located (relative to the project directory).
You should store your project documentation files in a subdirectory of the project directory and version control them in the same way as your other version controlled files. You can then keep your documentation up-to-date by checking them in and out along with their corresponding source files, regardless of version or configuration.