To move items between monitors
This procedure applies when two or more monitors are connected to one computer.
Open Display in Control Panel.
On the Settings tab, click Identify to display a large number on each of your monitors, showing which monitor corresponds with each icon.
Click the monitor icons and drag them to positions that represent how you want to move items from one monitor to another, and then click OK or Apply.
Drag an item on your desktop across your screen until it appears on the alternate monitor.
Or, you can resize a window to stretch it across more than one monitor.
To open Display, click Start, click Control Panel, click Appearance and Themes, and then click Display.
The arrangement of the icons determines how you drag items from one monitor to another. For example, if you are using two monitors and you want to move items from one monitor to the other by dragging left and right, arrange the icons side by side. To move items between monitors by dragging up and down, position the icons one above the other. The arrangement of the icons does not have to correspond to the physical positions of your monitors. You can place the icons one above the other even though your monitors are side by side.