How to add nodes inside admin area, e.g. for admin documentation I have an admin theme set. When I create a page in my custom module with an admin/... path it is rendered with the admin theme.

I've set up a node type for documentation and I'd like these to be inside the admin area. I've set the default menu to Management and I've given the page an alias that begins with admin/ but it's rendered in the normal (non-admin) theme.

How can I add nodes that will be considered part of the admin area, and rendered with the admin theme?
This can be done using Administration theme module:


  The Administration theme module allows you to use this theme on more pages like :
  
  
  batch processing pages
  devel node load and render pages
  coder code review pages
  pages you define yourself in the provided textarea
  


Emphasis mine.