Fix

docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md

@@ -32,7 +32,7 @@ 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:
+    If getting error message "cannot open display" then try to export DISPLAY variable before attempt to log in:
 
 ```console
  local $ export DISPLAY=localhost:0.0