diff --git a/doc/pipeline_building_cec.md b/doc/pipeline_building_cec.md
index 5a0ca1915fceede9e9a7a05e69017ae479c29a70..78ddaada98eb4b0a7770c0c320e7359bc941078c 100644
--- a/doc/pipeline_building_cec.md
+++ b/doc/pipeline_building_cec.md
@@ -355,14 +355,14 @@ src/install_nextflow.sh
 ```
 Then you can open an attached terminal using screen :  
 ```sh
-screen -S rnaseq # to create the rnaseq screen 
-src/RNAseq_script.sh # to launch the script
+  screen -S rnaseq # to create the rnaseq screen 
+  src/RNAseq_script.sh # to launch the script
 ```
 
 Maintain CTRL +A pressed and then press D to detach the screen.  
 Use :
 ```sh
-screen -r rnaseq #to reattach the screen
+  screen -r rnaseq #to reattach the screen
  ```