Override Dock magnification

Macworld OS X Hint

By Rob Griffiths (macosxhints@macworld.com)
Override Dock magnification settings in 10.5
One of the features of the OS X Dock is the ability to magnify the items in it as the cursor passes over them.
Control this feature in the Dock System Preferences panel
set the amount of magnification and
enable or disable the feature.
enable or disable it by Control-clicking on the Dock's divider bar, and
choosing Turn Magnification On (or Off) from the pop-up menu.
Can't control the amount of magnification from this menu, however.)
Leopard adds a new feature to this magnification effect -- the ability to temporarily reverse the on/off status by holding down a couple of modifier keys.
Override Dock magnification settings in 10.5
http://www.macworld.com/article/131308/2007/12/dockmagnify.html?lsrc=mwhints