diff --git a/readme.org b/readme.org
index c45f5f2..e0ab2e0 100644
--- a/readme.org
+++ b/readme.org
@@ -255,14 +255,24 @@ region, making this binding useless.
 
 [[http://www.nongnu.org/ranger/][ranger]] uses ~o~.
 
-*** Jumping / Interactive "goto" (~gd~ and ~.~)
+*** Jumping / go to definition / view, display other window (~gd~, ~.~, ~o~, ~O~, ~RET~, ~S-RET~, ~M-RET~)
 
-- ~gd~: [g]o to [d]efinition.
+- ~gd~: [g]o to [d]efinition.  Unless ~RET~ has an obvious meaning, it should be a synonym of ~gd~.
+
+- ~o~, ~O~: go to definition in other window and display in other window respectively.
+  The latter is like the former with the focus remaining on the current window.
+
+- ~S-RET~, ~M-RET~: Same as ~o~ and ~O~ when available.
+
+The point of having two binding pairs is that they might not always be available.
 
 - ~.~: go to current entity (day for calendar, playing track for [[EMMS][EMMS]]).
-Bind only if more relevant than ~evil-repeat~.
+  Bind only if more relevant than ~evil-repeat~.
 
-mu4e has ~j~ in Emacs, ~J~ in Evil.
+Existing binginds:
+
+- mu4e has ~j~ in Emacs, ~J~ in Evil.
+- ~C-o~ is possibly used for "display other window".
 
 *** Browse URL (~gx~)