diff --git a/docs/designer/src/SUMMARY.md b/docs/designer/src/SUMMARY.md
index 2c3e48a76f..86f0e1ea02 100644
--- a/docs/designer/src/SUMMARY.md
+++ b/docs/designer/src/SUMMARY.md
@@ -1,3 +1,4 @@
 # Summary
 
 - [Why a design language?](./design_language.md)
+- [Layout and CSS classes](./guidelines.md)