Tile groups in Windows 8 naming
- Move the mouse pointer in the lower-right corner of the start screen.
- Click on the small Minus Symbol. The start screen is now displayed in an Overview.
- Select by right-clicking the tile group that you want to rename (tile groups separated by a distance from the other groups).
- Menu that appears, click on "name group".
- Type in the appearing text box, type a name for you group and confirm your entry.
- With a click on an empty area of you back to the start screen.

Groups in the Overview name
As tiles on the Win8 start screen zoom in or smaller, read here.
