added sfx version note
@@ -3,6 +3,11 @@ Silhouette
Creating a node graph widget in Silhouette FX.
+.. note::
+ Requires Silhouette ``7.x`` or above as previous versions don't
+ come built-in with its own PySide2 build or provide access to the
+ ``QMainWindow`` object.
+
.. image:: ../_images/app_silhouette_example.png
:width: 800px
