Adding to playlists on the Prime 2

There doesn’t seem to be any way to add a track to a playlist from anywhere on the Prime 2. Either there’s something not enabled in the setup or this software is incredibly not user friendly managing files. Is there a good reason why it’s so restrictive moving tracks around or removing between crates, playlists and prepare? Being involved in software development in the past I fail to understand this blocking and restrictive usability. Searching it isn’t hard to find others in the same frustrating position and the user guide doesn’t help at all.