I wanted to mention the following:
I started with a tutorial. I wanted to start form scratch so I closed all my sheets or drawings and I wanted to (as part of the tutorial) setup my parameters, (units etc.)and start a new. The thing is when I closed all my documents I lost the controls in the upper right of the program. I could not close, or minimize the current windows so I could not toggle back to the tutorial and view the comments. I had to open up a blank document to get these features back.