C.43. File menu

C.42. File Exchange control panel

Eliminated. Mac OS X now understands and even uses the three-letter file extensions that PCs use to recognize file types, for better Mac/PC file compatibility. Still, if you want to remap a certain document so that it opens in a different program (a primary function of the old File Exchange program), proceed like this: Highlight its icon, choose File Get Info, open the Open With panel, choose a new program from the pop-up menu, and then click the Change All button.