How to create Window in roof (not dormer) just window in roof. Similar to adding windows in wall.

I would like to ask: How to create Window in roof (not dormer) just window in roof. Similar to adding windows in wall.

I`ve seen this solution for a window dormer, but this is not what I'm looking for. Does it existing any easy way to add (roof window) into the roof in AECOsim? If yes can you share how to do this please?

*easy way I mean similar to, how easy is adding window/door in the wall. I`am not looking to do this in 3d or any other around time consuming method because I know them. I`am looking for simple answer for this specific question.

Kind Regards,
Jakub