Dual Monitors Question:Extended Mode not Working

I had connected a second monitor to my notebook and everything worked great. Then I had to go mobile with my notebook and did something so that the monitor worked only on my notebook. Now I'm haveing trouble getting my second monitor to work again. All I can get it to do is show the same as my notebook monitor. I work all day on the computer but not very literate with computer lingo. HELP, PLEASE! What am I doing wrong?
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  1. Figured out how to fix it. I had to go into Graphic Properties, all set.
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