diff --git a/README.org b/README.org
index 110bb40..9362a46 100755
--- a/README.org
+++ b/README.org
@@ -2,13 +2,11 @@
 
 * Emacs tutorial
 
-  Some hints to use GNU-emacs
+Some hints to use GNU-emacs
 
-  Emacs is a modular and extensible text editor. Users can customize and use only the
-  specific packages that are needed for their tasks.
+Emacs is a modular and extensible text editor. Users can customize and use only the specific packages that are needed for their tasks.
 
-  Emacs is free software project with many years of development and a very active
-  and friendly community.
+Emacs is free software project with many years of development and a very active and friendly community.
 
   Emacs can be used for multiple purposes, for instance:
 
@@ -51,7 +49,8 @@
 
 * Contact
 
-[[https://www.onecluster.org/][Onecluster]] is a community of people who enjoy learn and share experiencies about
-free-software.
+[[https://www.onecluster.org/][Onecluster]] is a community of people who enjoy learning and sharing experiencies about free-software {libre as in freedom}.
 
 For questions, comments, doubts about free-software visit our [[https://ayuda.onecluster.org/][Discourse]]
+
+Please let us know if you liked, used or have any question or suggestion on how to improve this tutorial.
diff --git a/doc/org_intro.org b/doc/org_intro.org
index 972e626..1841ac5 100755
--- a/doc/org_intro.org
+++ b/doc/org_intro.org
@@ -44,27 +44,3 @@ structure in tasks.
 
 PS: "RET" is the same "enter" key
 
-** org-babel
-
-Reference for header arguments:
-
-https://org-babel.readthedocs.io/en/latest/header-args/
-
-** Include templates in org babel
-
-Use:
-
-: M-x org-insert-structure-template
-
-Or keybinding
-
-: C-c C,
-
-Then choose an option (src, example, center, comment)
-
-Or use org-tempo. To include a src code block in the document:
-
-: <s TAB
-
-Change the letter for each option that you need (a, C, c, E, e... for "export ascii",
-"comment", "example"...)
diff --git a/doc/using_alt.org b/doc/using_alt.org
index b5c3b15..2175dec 100755
--- a/doc/using_alt.org
+++ b/doc/using_alt.org
@@ -5,7 +5,7 @@
 
 Use the following keybindings to edit in emacs
 
- * CTRL (C)
+ * CTRL (~C~)
  * ALT (~M~)
  * CTRL + x (~C-x~)
  * ALT + x (~M-x~)
diff --git a/doc/using_ctrl_x.org b/doc/using_ctrl_x.org
index a6716ae..65dc839 100755
--- a/doc/using_ctrl_x.org
+++ b/doc/using_ctrl_x.org
@@ -5,7 +5,7 @@
 
 Use the following keybindings to edit in emacs
 
- * CTRL (C)
+ * CTRL (~C~)
  * ALT (~M~)
  * CTRL + x (~C-x~)
  * ALT + x (~M-x~)