readme: Finalize marking rationale

readme.org

@@ -171,7 +171,7 @@ The rules are more-or-less sorted by priority.
 	- ~.~
 
 
-** Rationale (Work in progress)
+** Rationale
 
 Many special modes share the same set of similar actions.  Those actions should
 share the same bindings across all modes whenever feasible.
@@ -242,36 +242,32 @@ not seem to be any existing use of it, we leave the binding free for other uses.
 
 *** Marking
 
-Emacs inconsistently uses ~u~ and ~U~ to unmark.  Since in Vim those keys are
-usually bound to "undo", they are probably best left to commands that undo
-actions in the buffer and not undo marks.
-
 ~m~ defaults to ~evil-set-marker~ which might not be very useful in special
-modes.  This is somewhat debatable though.
-
-Suggested mark bindings:
+modes.
+~'~ can still be used as it can jump to other buffers.
 
 - ~m~: Mark or toggle mark, depending on what the mode offers.
+In visual mode, always mark.
+With a numeric argument, toggle mark on that many following lines.
+
+- ~u~: Unmark current selection.
+
+- ~U~: Unmark all.
 
 - =~=: Toggle all marks.  This mirrors the "invert-char" Vim command bound to =~=
 by default.
 
-- ~M~: Remove all marks.
+- ~M~: Mark all, if available.  Otherwise use =U~=.
+
+- ~*~: Mark-prefix or mark all if current mode has no prefix. ~*~ is traditionally a wildcard.
 
 - ~%~: Mark regexp.
 
 - ~x~: Execute action on marks.  This mirrors Dired's binding of ~x~.
 
-While ~m~ won't be available for setting marks (in the Vim sense), ~'~ can still
-be used as it can jump to other buffers.
+If ~*~ is used for marking, then ~#~ is free.
 
-Optionally:
-
-- ~*~: Mark all, because ~*~ is traditionally a wild card.
-
-- ~#~: Remove mark.  This is useful when we want to unmark a region having both
-marked and unmarked entries.  But ~M~ could also be made to remove all marks on
-region, making this binding useless.
+Also note that Emacs inconsistently uses ~u~ and ~U~ to unmark.
 
 *** Selecting / Filtering / Narrowing / Searching