Hi
It feels that the app ought to be able to do this, but I've been frustrated to find the solution.
Pressing and holding a particular track brings up a menu which includes 'add to playlist'. After selecting this it is unclear as to what playlist it has been added. Certainly there is no selection process.
Under 'playing now' it is possible to specify a playlist under 'action' but instead of adding the track the whole album is added (and worse still the original playlist is totally trashed if an existing one is selected).
Perhaps I'm doing something wrong. Any pointers would be gratefully received.