Something I have wanted for a while is to have M-RET work "as
expected"(?)  on keyword lines such as #+LATEX_HEADER, #+CAPTION etc.

An "animation" to illustrate, where '|' is point:

    #+CAPTION: this is a |long caption

    #   click <M-RET> ⇒ 

    #+CAPTION: this is a 
    #+CAPTION: |long caption

Would anyone else like this?

Attached is a quick patch that works surprisingly well.  I would work
more on it if you guys agree this would be useful.  It probably need
much more work for corner-cases (any ideas what these are)?


When the facts change, I change my mind. What do you do, sir?
>From 60a9cefcc2997cc53a448d1c57ca71935ea6426f Mon Sep 17 00:00:00 2001
From: rasmus <ras...@gmx.us>
Date: Wed, 19 Nov 2014 15:39:19 +0100
Subject: [PATCH] org.el: Add keyword-support to M-RET

* org.el (org-insert-keyword): New function.
(org-meta-return): May call `org-insert-keyword'.
 lisp/org.el | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/lisp/org.el b/lisp/org.el
index dbd2cb7..627c409 100755
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -21286,6 +21286,18 @@ number of stars to add."
     (unless toggled (message "Cannot toggle heading from here"))))
+(defun org-insert-keyword (&optional arg)
+  "Insert a new keyword at point.
+ARG may be used to specify a keyword.  Otherwise the keyword is determined from the context.
+Mainly used for `org-meta-return'."
+  (interactive "P")
+  (let* ((elm (org-element-at-point))
+	 (key (or arg (and (eq 'keyword (org-element-type elm))
+			   (org-element-property :key elm)))))
+    (and key (insert (format "\n#+%s: " key)))))
 (defun org-meta-return (&optional arg)
   "Insert a new heading or wrap a region in a table.
 Calls `org-insert-heading' or `org-table-wrap-region', depending
@@ -21298,12 +21310,13 @@ on context.  See the individual commands for more information."
         (when (eq type 'table-row)
           (setq element (org-element-property :parent element))
           (setq type 'table))
-        (if (and (eq type 'table)
-                 (eq (org-element-property :type element) 'org)
-                 (>= (point) (org-element-property :contents-begin element))
-                 (< (point) (org-element-property :contents-end element)))
-            (call-interactively 'org-table-wrap-region)
-          (call-interactively 'org-insert-heading)))))
+        (cond  ((and (eq type 'table)
+		      (eq (org-element-property :type element) 'org)
+		      (>= (point) (org-element-property :contents-begin element))
+		      (< (point) (org-element-property :contents-end element)))
+		(call-interactively 'org-table-wrap-region))
+	       ((eq type 'keyword) (call-interactively 'org-insert-keyword))
+	       (t (call-interactively 'org-insert-heading))))))
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