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diff --git a/doc/emacs/trouble.texi b/doc/emacs/trouble.texi
index 4da3d4a3e89..9a638818c91 100644
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+++ b/doc/emacs/trouble.texi
@@ -57,6 +57,13 @@ incremental search, @kbd{C-g} behaves specially; it may take two
successive @kbd{C-g} characters to get out of a search.
@xref{Incremental Search}, for details.
+ If you type @kbd{C-g} in a minibuffer, this quits the command that
+opened that minibuffer, closing it. If that minibuffer is not the
+most recently opened one (which can happen when
+@code{minibuffer-follows-selected-frame} is @code{nil} (@pxref{Basic
+Minibuffer})), @kbd{C-g} also closes the more recently opened ones,
+quitting their associated commands, after asking you for confirmation.
+
On MS-DOS, the character @kbd{C-@key{Break}} serves as a quit character
like @kbd{C-g}. The reason is that it is not feasible, on MS-DOS, to
recognize @kbd{C-g} while a command is running, between interactions