Index: trunk/doc/user/09_appendix/actions/atomic.html
===================================================================
--- trunk/doc/user/09_appendix/actions/atomic.html	(nonexistent)
+++ trunk/doc/user/09_appendix/actions/atomic.html	(revision 20552)
@@ -0,0 +1,11 @@
+This action allows making multiple-action bindings into an atomic
+operation that will be undone by a single Undo command.  For example,
+to optimize rat lines, you'd delete the rats and re-add them.  To
+group these into a single undo, you'd want the deletions and the
+additions to have the same undo serial number.  So, you <arg>Save</arg>,
+delete the rats, <arg>Restore</arg>, add the rats - using the same serial
+number as the deletes, then <arg>Block</arg>, which checks to see if the
+deletions or additions actually did anything.  If not, the serial
+number is set to the saved number, as there's nothing to undo.  If
+something did happen, the serial number is incremented so that these
+actions are counted as a single undo step.
Index: trunk/src/undo_act.c
===================================================================
--- trunk/src/undo_act.c	(revision 20551)
+++ trunk/src/undo_act.c	(revision 20552)
@@ -55,21 +55,10 @@
 static const char pcb_acts_Atomic[] = "Atomic(Save|Restore|Close|Block)";
 
 static const char pcb_acth_Atomic[] = "Save or restore the undo serial number.";
+/* DOC: atomic.html */
 
 /* %start-doc actions Atomic
 
-This action allows making multiple-action bindings into an atomic
-operation that will be undone by a single Undo command.  For example,
-to optimize rat lines, you'd delete the rats and re-add them.  To
-group these into a single undo, you'd want the deletions and the
-additions to have the same undo serial number.  So, you @code{Save},
-delete the rats, @code{Restore}, add the rats - using the same serial
-number as the deletes, then @code{Block}, which checks to see if the
-deletions or additions actually did anything.  If not, the serial
-number is set to the saved number, as there's nothing to undo.  If
-something did happen, the serial number is incremented so that these
-actions are counted as a single undo step.
-
 @table @code
 
 @item Save