If you use a Mac for a short time without the ability to turn off the monitor, just move the cursor, just go ahead and set it in System Preferences, as follows: Open System Preferences, click Exposé and spaces; Then set the exposé Active screen corner and its corresponding function in the exposé and Spaces settings interface. In the following example, I define the lower right corner of the screen as "put the Monitor into sleep", you can set the different functions of the screen Four corners according to your preference.
Once you've set up the picture above, you can turn the monitor off at any time by moving the cursor to the lower right corner of the screen, and moving the cursor to a few other corners of the screen activates the respective function--depends on how you set it up. So we can turn off the monitor conveniently. This site editor: This article has a question to ask you readers, if it is the MacBook External monitor, through the exposé of this function can separate the display without affecting the external monitor it?