diff --git a/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md b/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
index 2b3809ad56caf65f11a2a6d8ae258aa045512e9b..8dc0576a0e3ca807ceb80187b8c663a469cade10 100644
--- a/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
+++ b/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
@@ -33,6 +33,7 @@ In order to display graphical user interface GUI of various software tools, you
 
 !!! tip
     If unable to execute graphical sofware showing error message "cannot open display" then try export DISPLAY variable before log in using the -X option in ssh client:
+
 ```console
  local $ export DISPLAY=localhost:0.0
 ```