diff --git a/Multiscreen.md b/Multiscreen.md
index d88d595..b09c16c 100644
--- a/Multiscreen.md
+++ b/Multiscreen.md
@@ -20,3 +20,4 @@ Tested on RPI4
 
 for more readings:
 https://doc.qt.io/qt-5.12/embedded-linux.html
+https://stackoverflow.com/questions/50867041/qt-qml-screen-mirroring-in-a-dual-monitor-setup