Resize Icons Quickly in Windows 7 or Vista Explorer
If you are in a folder or the desktop and would like to quickly resize the icons, there’s a shortcut you can use with your mouse wheel to resize the icons. This is a great way to actually see everything. Quickly and easily.
Just hold down the Ctrl key, and scroll the mouse wheel in any folder. The icons will immediately resize bigger or smaller.
NOTE: You must be in one of the ICON views when you are in Windows Explorer.
If your at the desktop, just hold the control key and "roll" the mouse wheel in either direction.