I have a somewhat eclectic mix of music on my account ,and would like to have the ability to simply play all the songs in my library without having to manually add each song into a large playlist. Or even the option of adding full playlists together.
Updated on 2020-05-26
Thanks for reaching out. You can play all the songs you liked from your 'Liked Songs' in Your Library. If the songs that you want to play are in different playlists you can play them at the same time by adding the playlists to a Playlist folder. You can find more info about this in the image below.
Hope this helps and have a nice day 🙂