A couple buttons I dont know what they do? Premiere

So there are a couple buttons in premiere and im wondering what they do?

-Show duplicate frame markers (on the wrench icon in timeline panel)

-Track output chanel assignment (right click timeline track)

-Toggle automatic rescaling (effects control panel right click)

-Open and close IME and also the reconversion (right click search bar in project panel)

Source Settings (right click clip in the project panel)

Generate Audio Waveform (under clip panel)

If you know what any of these buttons mean it would mean the world to me if you shared your knowledge