1, of course, the external monitor must first connect to the notebook computer, and then in the desktop blank mouse right click to select the "Screen resolution" option;
2, in the open change the appearance of the display window, click the multiple display after the Drop-down button to select the "Expand these display" item, and then click OK to save it.
3, after the completion of the Win7 notebook open ppt, and then the ppt window to the edge of the notebook screen drag, you will find that the window will run itself to the external monitor.
4, you can also select the "Multiple display" setting in the Resolution Settings window, or you can quickly switch by pressing windows+p shortcut keys.
Tips: Multi-monitor support Win7 flagship version and above, if you are still home version of the proposal can be upgraded to the flagship version now most of the notebook computer is equipped with VGA port, as long as the monitor is connected to the VGA port, Win7 will automatically detect the new monitor.