If Emacs recognizes the encoding of a file incorrectly, you can
reread the file using the correct coding system by typing @kbd{C-x
@key{RET} c @var{coding-system} @key{RET} M-x revert-buffer
-@key{RET}}.
+@key{RET}}. To see what coding system did Emacs use to decode the
+file, look at the coding system mnemonic letter near the left edge of
+the mode line (@pxref{Mode Line}), or type @kbd{C-h C @key{RET}}.
@vindex buffer-file-coding-system
Once Emacs has chosen a coding system for a buffer, it stores that