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-rw-r--r--doc/emacs/rmail.texi5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/emacs/rmail.texi b/doc/emacs/rmail.texi
index 51bd6086ce0..f94708b08ac 100644
--- a/doc/emacs/rmail.texi
+++ b/doc/emacs/rmail.texi
@@ -875,7 +875,10 @@ already composing, or to alter a message you have sent.
If you set the variable @code{rmail-mail-new-frame} to a
non-@code{nil} value, then all the Rmail commands to start sending a
message create a new frame to edit it in. This frame is deleted when
-you send the message.
+you send the message (but not if it is the only visible frame on the
+current display, or if it's a text-mode frame). If this frame cannot
+be deleted when you send the message, Emacs will try to reuse it for
+composing subsequent messages.
@ignore
@c FIXME does not work with Message -> Kill Message
, or when you use the @samp{Cancel} item in the @samp{Mail} menu.