Windows 8:Take change of the Start screen

Microsoft understandably gives its own apps due prominence on the Start screen, but you’re free to change that. You can drag tiles around the grid, and a right-click on certain tiles brings up options to make them larger or uninstall them completely.
You should make good use of Windows 8’s tile groups. You can drag any tile to a blank space on the Start screen to create a new group, but for some baffling reason you can’t name those groups immediately. Instead, you have to use Semantic Zoom – pinch to zoom out on a tablet, hold Ctrl and scroll the mouse wheel, or click the tiny minus symbol in the bottom-right corner. Then, when in the zoomed-out view, just right-click or swipe a finger upwards on a group to give it a name. It might not sound like much, but when you have a lot of applications installed, it makes a significant difference to usability.
As for the grid layout, there’s also a way to change the number of tile rows on the Start screen – but don’t get your hopes up. The highest supported row count is six and the maximum for any given device is determined by screen size and resolution, so if your tablet boots with three rows then you probably won’t be able to increase that number. Still, it can be useful for lowering the row count on a big monitor – perhaps to match the layout of a smaller tablet or laptop for consistency.
To tweak this, search for and run “Regedit”, and before you do anything, click File | Export and save the Registry in case anything goes wrong. Then navigate to HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionImmersive-ShellGrid and look for an entry named Layout_MaximumRowCount. If it isn’t there, right-click on an empty space and create a new DWORD value, and give it that name. Then edit that entry, enter the number of tile rows you’d like and reboot your system.