Apple Logic Pro /LogicExpress Discussion

So....tell me.....what ARE these two different commands?  I have a pretty good idea, but 
would love to see it in your words!!!
> 
> There are two different key commands - one for creating another track of the 
> same thing, and for creating another track with the next thing. This applies 
> to both audio and midi. for example if i have midi channel five then the next 
> will be midi six. There are a lot of cases where you want duplicates of the 
> same track - doing different versions and muting the rejects, or when verse and 
> chorus parts overlap you can see what is going on if you move them so they 
> don't overlap. Of course with audio, you will eventually hit the max that you set 
> in the audio prefs.