diff --git a/README.org b/README.org
index 5505c57..5653c18 100644
--- a/README.org
+++ b/README.org
@@ -17,7 +17,7 @@ opportunity to learn about computers, files, directories and programs.
 
 ** Appearance, screens
 
- * [[./tutorial/i3wm_screens.org][xrandr: working with two screens in i3-wm]]
+ * [[./tutorial/i3wm_screens.org][xrandr: working with multiple screens in i3-windows manager]]
 
 ** Manuals, documentation
 
diff --git a/tutorial/diff.org b/tutorial/diff.org
index ea25fbc..7b97520 100644
--- a/tutorial/diff.org
+++ b/tutorial/diff.org
@@ -21,8 +21,11 @@ You can redirect the output to a file and make a patch: a file containing the di
 
 ** Comparing directories
 
-Some arguments may be hepful to have an output showing the differences between two directories:
-~--brief~ (show only the differences) and ~-r~ (compare the directories that are located within the main directory also)
+Some arguments may be hepful to have an output showing the differences between
+two directories:
+
+ * ~--brief~ (show only the differences) and
+ * ~-r~ (compare the directories that are located within the main directory also)
 
 #+begin_example bash
   diff --brief -r directory1 directory2
@@ -30,8 +33,8 @@ Some arguments may be hepful to have an output showing the differences between t
 
 Another approach to compare all the files within each directory is to use:
 
-- ~q~ : Shows only differences
-- ~r~ : Run the command recursively
+ * ~q~ : Shows only differences
+ * ~r~ : Run the command recursively
 
 #+begin_example bash
   diff -qr directory1 directory2
diff --git a/tutorial/i3wm_screens.org b/tutorial/i3wm_screens.org
index f0820bc..6fc3b28 100644
--- a/tutorial/i3wm_screens.org
+++ b/tutorial/i3wm_screens.org
@@ -1,4 +1,5 @@
 #+options: toc:nil num:nil
+#+date: 2023-11-24
 
 * How to use "xrandr" to use multiple screens in i3-wm
 
@@ -10,7 +11,9 @@ So you can use the command line to solve the problem.
 
 ** ~xrandr~ command
 
-~xrandr~ is a command line interface to RandR extension in GNU systems.
+~xrandr~ is a command line interface to RandR extension in GNU systems. [[https://wiki.archlinux.org/title/Xrandr][RandR]]
+(resize and rotate)is a communication protocol that allows to change the
+appearance of X Window System.
 
 From the manual:
 
@@ -41,7 +44,6 @@ That's all!
 
 You are good to use the new screen in a second workspace. Check the i3-wm userguide for more information.
 
-
 ** References
 
 - [[https://i3wm.org/docs/userguide.html#_configuring_your_monitors][i3-wm documentation: configuring monitors]]
diff --git a/tutorial/rsync.org b/tutorial/rsync.org
index 1dbb044..0cbc6c7 100644
--- a/tutorial/rsync.org
+++ b/tutorial/rsync.org
@@ -10,13 +10,13 @@ The command accepts arguments:
 
 First use the source, then the destination
 
-#+begin_src sh
+#+begin_example sh
    rsync -rav /home/user/Documents /run/media/user/disk/backup/
-#+end_src
+#+end_example
 
 ~rsync~ can be also used with selective copyng based on file type
 
-#+begin_src sh
+#+begin_example sh
   rsync /home/user/Desktop/*.jpg /home/user/Desktop/backupdata/
-#+end_src
+#+end_example