Good Gear Guide
In Pictures: Making the most of Windows 8 - the di...
Managing windows in Metro mode
Metro is only meant to run one app at a time, which stands in stark contrast to most users' typical way of working on Windows, with multiple windows open side by side or on top of each other. To ameliorate this shortcoming, you can "snap" a Metro app to run in the margins of the screen, while another Metro app -- or the legacy desktop -- runs in the remaining space. The screenshot at left shows the Metro Weather app snapped to the right side of the display and running side by side with the legacy desktop. The draggable bar lets you reposition the snap to the other side of the screen or close it entirely.
In Pictures: Making the most of Windows 8 - the diehard's guide