How do I hide the comment-field in a pages document?

I'm currently writing a document in pages, and added some comments to my own text (the yellow notes). When I was done with the comments, I removed them, but the area to the left of the document where all of the comments were shown, did not dissapear.

So, now I have a gray area that takes about 25% of the document window, that I want to get rid of.