Now this is very interesting.We can change the size of desktop icons in Windows Vistas by just rolling our mouse over!!
Yes you read it right.I got this information from Amit's website that the size of desktop icons can now be changed by mouse's roll by a very simple method as follows:

Left-click anywhere on the desktop, hold the ‘Control’ key and move the scroll wheel on the mouse - the desktop icons will grow smaller or larger depending upon the direction of your scroll.

But this feature is just applicable in Windows Vista and not in Windows XP.

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