How to Change the Height of the Windows 7 Start Menu?
If you are not sure where can go to the settings to resize the start menu,
there is a quick and simple way to change the Start Menu size. I think many new users don't realiz it.
Right-click the Start button --> select Properties --> Under the Start Menu tab --> uncheck "Store and display recently opened programs in the Start menu."--> Click the Customize button --> change the Number of recent programs to display to 8 --> click the OK button.