diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index 03894f128..29f60c755 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -207,12 +207,35 @@ selection.
 TODO state, priority, tags, statistics cookies, and COMMENT keywords
 are allowed in the tree structure.
 
-*** Asynchronous code evaluatation in ~ob-shell~
+*** Asynchronous code evaluation in ~ob-shell~
 
 Running shell blocks with the ~:session~ header freezes Emacs until
 execution completes.  The new ~:async~ header allows users to continue
 editing with Emacs while a ~:session~ block executes.
 
+*** Automatic sync of source blocks and tangled blocks in ~ob-tangle-sync~
+
+Invoking minor mode =org-babel-tangle-sync-mode= synchronizes contents
+between a currently visited tangled file its org-mode source block
+(and vice versa) via the =after-save-hook=.
+
+Desired tangling actions can be assymetric depending on whether the
+org-mode source block header argument =:tangle-sync <action>= has an
+action of:
+
+- =skip= :: do nothing, just save the buffer, even if the sync mode is
+            active
+
+- =import= :: only pull changes from the tangled block into the
+              org-mode source block (even when visited from either)
+
+- =export= :: only pull changes from the org-mode source block into
+              the tangled block (even when visited from either)
+
+- =both= (or nil) :: freely sync changes of current buffer to
+                     associated source or target
+
+
 ** Miscellaneous
 *** Blank lines after removed objects are not retained during export