What is the gear option in the Audio Tab

[Tony_T]

At the right of the Audio Track encoding options, there is a "gear" that gives the option of naming that encoding.
I tried naming the track (i.e. Commentary), however it does not show up in the metedata.

[Nomis101]

This writes the 3gpp track 'titl' tag to your movie. In ffmpeg this is shown as "handler_name" and Mediainfo shows it as "title".