You can't. Play Next will always add the selection after the current Playing song. You can however drag & drop files into the Now Playing to the position you desire.

Right-click on a track and choose Play Last adds that song to the end of the Now Playing queue. Is that what you want? You can also move songs up and down in the Now Playing queue - click on the song and drag it up or down.

Hi. Is there a way to create a queue of songs to play? If I had a song playing, pressing play next always means I want that song next. However is there a way to add one song after another?
So I'd like to be able to have a now playing list full of songs on shuffle, then overwrite the shuffle by adding a song next, and more after that one if I want, and then back to shuffle after that list I create. Kind of like a jukebox.
Hopefully that makes sense.