When an audio file is loaded into a track, the track initially has the same name as the audio file. However, you can change the track name to whatever you like. To rename a track, double-click on its name. The name becomes an edit box, allowing you to either edit the existing name, or type a new one. To save the new name, press Enter, or left-click somewhere outside of the edit box. To cancel the edit, press Esc.
To revert to the track's original name (the audio filename), delete the entire name and press Enter.