describe-input-method).
By default, it describes the current input method (if any).
This description should give you the full details of how to
use any particular input method.
To choose an input method for the current buffer, use C-x
RET C-\ (set-input-method). This command reads the
input method name with the minibuffer; the name normally starts with the
language environment that it is meant to be used with. The variable
current-input-method records which input method is selected.
Input methods use various sequences of ASCII characters to stand for
non-ASCII characters. Sometimes it is useful to turn off the input
method temporarily. To do this, type C-\
(toggle-input-method). To reenable the input method, type
C-\ again.
If you type C-\ and you have not yet selected an input method, it prompts for you to specify one. This has the same effect as using C-x RET C-\ to specify an input method.
Selecting a language environment specifies a default input method for
use in various buffers. When you have a default input method, you can
select it in the current buffer by typing C-\. The variable
default-input-method specifies the default input method
(nil means there is none).
Some input methods for alphabetic scripts work by (in effect) remapping the keyboard to emulate various keyboard layouts commonly used for those scripts. How to do this remapping properly depends on your actual keyboard layout. To specify which layout your keyboard has, use the command M-x quail-set-keyboard-layout.
To display a list of all the supported input methods, type M-x list-input-methods. The list gives information about each input method, including the string that stands for it in the mode line.
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