Update qtiplot.md

docs.it4i/software/viz/qtiplot.md

@@ -19,14 +19,15 @@ $ ml av QtiPlot
 
 ## Running QtiPlot
 
+!!! important
+    You must first enable [VNC][a] or [X Window System][b] GUI environment.
+
 To run QtiPlot, use:
 
 ```console
 $ ml QtiPlot; qtiplot
 ```
 
-!!! important
-    To run QtiPlot, you must first enable [VNC][a] or [X Window System][b] GUI environment.
 
 [1]: https://www.qtiplot.com/index.html