You can tap the add to queue icon next to a track or hold down the dial when you have a song highlighted. There's voice ]support as well, so you can say something like "Hey Spotify, ...

“Create a queue” is available until September 10, with clicking “Try it out” enabling immediately. All thumbnails with this experiment gain an “Add to queue” button that uses a list icon.

Car Thing users can either tap “add to queue” icon next to a track in their tracklist; use the device’s dial to highlight the track, then press and hold to add it to the queue; or use voice ...