Quote:
Not sure if this is what you're looking for.
http://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/how-to-change-desktop-grid-size/1a2fa51a-a46c-4116-8de3-ffc04fd52abb
1. Right-click on the desktop and select "Personalize"
2. Select "Window Color" from the group of icons on the lower edge of the Personalization window that appears.
3. Select "Advanced appearance settings..."
4. In the Window Color and Appearance window, you can select an item to customize from a drop-down list, start with "Icon Spacing (Horizontal)" to adjust the right-left space between icons, and then "Icon Spacing (Vertical)" to adjust the top-bottom space between icons.