New user with question about the spectrum analyzer

I am trying the n-Tracks trial version. So far, I like the look and layout of the program, but I’m having a problem.

I somehow lost the spectrum analyzer window and cannot figure out how to get it back. I have tried the help which suggests right clicking in a certain other window, but I cannot find that window either. Can anyone tell me how to get the frequency spectrum window back?

In any of the mixer stripes, try clicking the icon to the left of the three EQ knobs.

That worked. Thank you.