Running Word 2013.

I'm doing a markup on my document, a mystery novel (Sold to the publisher, yay!) and I'm okay with how Track Changes works but I'm trying to display a larger portion of the screen for the document itself and a smaller zone for the parallel markup display to the right, which shows who did the markup. It's all my markup anyway, but I want to shrink the right-hand and mostly blank comment panel for now, and make the document display section larger if possible, maybe toggling the right-hand mostly blank comments zone on and off if possible.

Maybe later when I get the doc sent to and from the publisher in the editing process, I will need to read the comments, but right now I want to make that zone more slender and have the document itself a larger amount of the display, for my weak old eyes, ha ha.

Help menu is useless.

Thanks!