Managing Fonts with Font Book in Mac OS X Lion
Font Book in Mac OS X Lion lets you view your installed fonts, install new fonts, group your fonts into collections, and enable and disable installed fonts. As usual, you find the Font Book application in the OS X Lion Applications folder at root level on your hard disk.
Other ways you can install new fonts are to choose File→Add Fonts or press Command+O. A standard Open dialog allows you to select a font or fonts to be installed.
Note that by default, new fonts are installed in your Home folder’s Fonts folder (Users/Home/Library/Fonts). You can change the default installation location in the Font Book preferences pane by selecting Font Book→Preferences or Command+, (comma).
To view a font, click its name in the Font list. To change the size of the viewed font, click the triangle in the top-right corner of the Font Book window and choose a new size from the drop-down list that appears, or type a number where the word Fit appears, or move the blue slider dot on the right side of the window up or down.
To disable a font so it no longer appears on any applications’ Font menus, choose Edit→Disable or click the Disable button (the check mark in a square button) at the bottom of the window.
To enable a previously disabled font, choose Edit→Enable or click the Enable button (same as the Disable button).
Lion’s Font Book looks out for your best interests; it won’t allow you to disable or delete any fonts required by Lion — including (but not limited to) Lucida Grande, Helvetica, and Helvetica Neue.