Customizing the Appearance and Behavior of the Dock
The Dock offers several behaviors you can change to suit your preferences. You can also change various aspects of its appearance, as follows:
Size You can change the default or current size of the Dock.
Magnification Effect The magnification effect causes items on the Dock to be magnified when you point to them. This can make identifying items easier, especially when there are many items on the Dock or when it is small (see Figure 5.4). You can set the amount of magnification that is used.
Figure 5.4. The magnification effect makes it easier to identify items, although the magnification level of this particular Dock would be a bit much for most Mac users.
Hide/Show The Dock does consume some screen ...
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