diff --git a/Docs/ref_sensors.md b/Docs/ref_sensors.md
index 6e874d346..795034012 100644
--- a/Docs/ref_sensors.md
+++ b/Docs/ref_sensors.md
@@ -14,6 +14,9 @@
 *   [__Semantic segmentation camera__](#semantic-segmentation-camera)  
 *   [__DVS camera__](#dvs-camera)  
 
+!!! Important
+    All the sensors use the UE coordinate system (__x__-*forward*, __y__-*right*, __z__-*up*), and return coordinates in local space. When using any visualization software, pay attention to its coordinate system. Many invert the Y-axis, so visualizing the sensor data directly may result in mirrored outputs.  
+
 ---
 ## Collision detector