Desktop and other squashed vertically

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http://www.linuxquestions.org – Naughty me! I was playing around with Desktop appearance and ended up with all pages squashed up horizontally. Not severely but it changes the look of all pages, and I have adjusted my eyes to another setting. How do I change things so that I get back to w here I was. I imagine I can change sizes until I find the right look. I am 75 so don't be too hard on me. Thank you folks. PS: In the heading "Linux - Newbie" is says.....'if not in the MAN pages.....what is a man page, I guess it is the main pages, yes? (HowTos)