As you build your playlist, you may edit it as needed. The up arrow button shifts the selection up one in the list, and the down arrow button shifts the selection down one in the list. The funny looking off-set rectangles button shuffles the playlist randomly. If the file is stored on a writable volume, you can optionally fill in the ID3 tag information. Trax will then launch your player and send the list of files to play.
File names turn green to indicate they have been sent to the player.
If you wish, you may save your playlist as a Trax file, allowing you to open it again at a later time for playback. Also note that only the list of files currently available are sent to the player. If you currently have an unsaved playlist open, Trax will prompt you to save it. Preferences Trax allows you to customize several features for your setup. This is useful if you keep other files in the same directory as your audio files.