By default size of icons on Windows Vista desktop is just OK. However, some users prefer desktop icons very small incase of more number of icons or large icon size incase of less number of icons. In Vista you can customize icon size to desired level.
Enlarge or Reduce desktop icon size
1. Minimize all opened windows (press window key and M key).
2. Right click on desktop and point to view option.
3. Select among Large icons, medium icons, classic icons.
Customize to any icon size
1. Minimize all opened windows (press window key and M key).
2. Single left click on any desktop icon.
3. Hold the Ctrl key and scroll mouse wheel forward or backward to enlarge or reduce size of desktop icons on your Windows Vista computer.