Sometimes I add a large number of songs to my queue, an entire album or a lot of songs from a playlist of mine, for example, to my queue. I then start to do something else where I want to listen to different music but still keep the previous songs in my queue. I would suggest a way to hide or save songs in a queue which you can then go back to in order to listen to them later. Possibly a secondary queue? You would be able to switch between queues in order to listen to those songs.