You can reassign many of them using Microsoft Mouse and Keyboard Center. The following table specifies the default key assignments for the alternate command keys. When the F Lock light is On, standard functions work (F1, F2, and so on).
When the F Lock light is Off, alternate functions work (Help, Undo, and so on). If your keyboard has an F Lock key, press it to toggle between the standard commands and alternate commands. You can press and hold Fn while pressing keyboard letters M, J, K, L, U, I, O, P, /,, and 0 to match the physical layout of a numeric keypad. You can also press and hold Fn while moving your finger up and down on the navigation pad to scroll within a document. On keyboards with an Fn key, hold down Fn and press the key to use the alternate commands. In some programs, the function of a standard command and an alternate command may be the same (for example, F1 typically displays Help for the active window, and on some keyboards, the alternate command for F1 is also Help).
Alternate commands are labeled on top of the keys (such as Redo). Standard commands are labeled on the front of the keys (such as F3). This includes the top row of standard function keys (F1–F12). Keys with an Fn key or F Lock provide two sets of commands for many keys.
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