I think you're maybe looking for two things. The first would be to make it "full screen" which, in Internet Explorer, is done by pressing F11. Depending on your browser you should be able to enable a full screen mode.
Second, a handy freeware (non-spyware/malware/adware) application for taking a screenshot would be located at
www.xnview.com if you would like. That should easily capture anything located on your screen in a variety of formats.
(I figure I came here to ask a question so it is my duty to find one that was in my skillset and answer it.)
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