Where is the MASTER track gone?

Seems a stupid question:
If I create a 16 track project, all tracks are being routed to the MASTER.
Now in my project I have 16 MIDI tracks which of course trigger instruments.
Some audio output of thise instruments is being routed to busses to have a "common FX" applied to the sounds. Some others go "out", I can hear them, but the output isn't "MASTER".
Now I am almost ready with the mix and wished to add some mastering applications to the MASTER.
But I do not seem to find that console anymore.
I cannot have deleted that, can I ?
But if I could have done so, how can I get a new one? 
I know, that's a dummy one. But I can't finish my thing. 
Of courde I could do a raw mix, and remaster that in a new project.
The disadvantage is, if I find that after mastering an instrument is to prominent, I first have to readjust everyting in the raw mix and do things again. I need the MASTER back in my original project. Pleeeeeaaazzzzzzz.

scook

Mad_Musicologist
I cannot have deleted that, can I ?
But if I could have done so, how can I get a new one? 

Yes, it is just a check mark next to "Set as Default Bus" on the context menu of a bus labeled Master.

I do not see a bus labeled Master. :-(  And I do not see such a thing as "Set as Default Bus".

scook 
Right-click a bus and enable "Set as Default Bus." All future buses, audio and instrument tracks will automatically set their output to the default bus. Select all existing tracks as necessary to re-route them to the new bus. Rename the new default bus as needed.

When I can see that I will try it out. 
Anyway, thanks for your reply.

Looks nice, but: I could create that bus only in the console view. And now, upon starting playback, I hear only a deafening double click, the new Master bus shows extreme clipping, and then: nothing. total silence. And that "Set as default bus": I do not see it. Well, I do not know how this would look in the language I am using by default (German), but from the meaning of the command it should be something like "Als Standard Bus setzen". But I don't see anything comparable or equivalent to this.
I also note, in my track view the tracs have numbers, your screenshot shows letters. Seems I got it all wrong.
 

You can see "Set as default bus" in the console view too. I guess because you are right clicking at wrong area. (i.g. at Volume slider, at Level meter, etc.)
Please try to right click at empty area in I/O area of any bus in the console view, you should be able to see "Set as default bus". (Als Standardbus definieren)

scook
(...)
 
There is not enough information to discuss the result of adding the bus. Your posts lack any hardware or software specs.

Sorry.
Cakewalk Sonar by Bandlab being the host application.
Instruments are: Cakewalk TTS-1, Pianoteq 6, Aria player (Multi), the latter mostly being fed with samples.
So I am routing all the various audio out channels to the Master bus, only those with an exclusive bus for shared fx are routed to their exclusive bus. Then the audio outs of those exclusive busses are being routed to the Master bus.