put to sleep one monitor in a dual or triple monitor situation

[robertgrant1203]

So i recently added a third monitor to my set up. One is a big screen TV for movies and such, and the new one is a 21 inch and i am using it for light movie/show watching, you know the kind when your just glancing and listening. im trying to cut my electricity use by not using the big screen when I'm not fully engaged in the movie/show..my primary monitor is also 21 inch and sits on a coffee table. Its a nice set up but the big screen and the new 21 inch monitor sits across the room. Id like to be able to turn off the monitor from the couch, it doesn't have a remote like the big screen does. Is there a way to put one monitor to sleep, and keep the primary monitor active. Something along the lines of a program or a way to set up a quick key to put one to sleep, I'm a newb to Linux and command line so a detailed description would be appreciated.

[nicolesharp100]

I am not sure if there is a way to do this automatically, but you can always go to "Menu" → "Preferences" → "Display" and manually turn off the displays for the monitors you are not using.