diff --git a/doc/acas_xu.rst b/doc/acas_xu.rst
index 7f558448acfce15f6318997a6eb4630797e8297b..13835141137d6ce158071c305dcfe673613cbbd9 100644
--- a/doc/acas_xu.rst
+++ b/doc/acas_xu.rst
@@ -18,8 +18,9 @@ The system considers a 2D plane with two entities: the monitored airplane (the
 "ownship") and an incoming airplane (the "intruder").
 
 .. image:: _static/media/acas_xu.png
-  :alt: A schematic with two aircrafts, seen from above, displaying the relative
-   angles of their trajectories
+   :scale: 50 %
+   :alt: A schematic with two aircrafts, seen from above, displaying the relative angles of their trajectories
+   :align: center
 
 In the original implementation, the system state has seven inputs: