diff --git a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/02.optical-systems-vergence-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/02.optical-systems-vergence-overview/cheatsheet.fr.md
index ff2908840..085b03184 100644
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/02.optical-systems-vergence-overview/cheatsheet.fr.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/02.optical-systems-vergence-overview/cheatsheet.fr.md
@@ -1,7 +1,11 @@
 ---
 title: 'nouveau cours : synthèse'
 published: true
+routable: true
 visible: true
+lessons:
+  - slug: gravitation-electrostat-magnetostat
+    order: 2
 ---
 
 ### Qu'est ce que l'imagerie optique?