diff --git a/src/kiwano/2d/animation/AnimationWrapper.h b/src/kiwano/2d/animation/AnimationWrapper.h
index 8640f51f..e3611209 100644
--- a/src/kiwano/2d/animation/AnimationWrapper.h
+++ b/src/kiwano/2d/animation/AnimationWrapper.h
@@ -27,6 +27,11 @@
 #include <kiwano/2d/animation/CustomAnimation.h>
 #include <kiwano/2d/animation/AnimationGroup.h>
 
+/**
+ * \addtogroup Animation
+ * @{
+ */
+
 namespace kiwano
 {
 
@@ -309,3 +314,5 @@ inline AnimationWrapper Group(const Vector<AnimationPtr>& animations, bool paral
 
 }  // namespace animation
 }  // namespace kiwano
+
+/** @} */
diff --git a/src/kiwano/2d/transition/BoxTransition.h b/src/kiwano/2d/transition/BoxTransition.h
index 54020f23..3f82c4d5 100644
--- a/src/kiwano/2d/transition/BoxTransition.h
+++ b/src/kiwano/2d/transition/BoxTransition.h
@@ -26,6 +26,11 @@ namespace kiwano
 
 KGE_DECLARE_SMART_PTR(BoxTransition);
 
+/**
+ * \addtogroup Transition
+ * @{
+ */
+
 /**
  * \~chinese
  * @brief 盒状过渡动画
@@ -49,4 +54,6 @@ protected:
     virtual void Init(Stage* prev, Stage* next) override;
 };
 
+/** @} */
+
 }  // namespace kiwano
diff --git a/src/kiwano/2d/transition/FadeTransition.h b/src/kiwano/2d/transition/FadeTransition.h
index 983e7a18..0a1c0ded 100644
--- a/src/kiwano/2d/transition/FadeTransition.h
+++ b/src/kiwano/2d/transition/FadeTransition.h
@@ -26,6 +26,11 @@ namespace kiwano
 
 KGE_DECLARE_SMART_PTR(FadeTransition);
 
+/**
+ * \addtogroup Transition
+ * @{
+ */
+
 /**
  * \~chinese
  * @brief 淡入淡出过渡动画
@@ -53,4 +58,6 @@ private:
     bool parallel_;
 };
 
+/** @} */
+
 }  // namespace kiwano
diff --git a/src/kiwano/2d/transition/MoveTransition.h b/src/kiwano/2d/transition/MoveTransition.h
index 899ee0b2..f81895cf 100644
--- a/src/kiwano/2d/transition/MoveTransition.h
+++ b/src/kiwano/2d/transition/MoveTransition.h
@@ -26,6 +26,11 @@ namespace kiwano
 
 KGE_DECLARE_SMART_PTR(MoveTransition);
 
+/**
+ * \addtogroup Transition
+ * @{
+ */
+
 /**
  * \~chinese
  * @brief 位移过渡动画
@@ -69,4 +74,6 @@ private:
     Point start_pos_;
 };
 
+/** @} */
+
 }  // namespace kiwano
diff --git a/src/kiwano/2d/transition/RotationTransition.h b/src/kiwano/2d/transition/RotationTransition.h
index 6be27d34..ccfb07df 100644
--- a/src/kiwano/2d/transition/RotationTransition.h
+++ b/src/kiwano/2d/transition/RotationTransition.h
@@ -26,6 +26,11 @@ namespace kiwano
 
 KGE_DECLARE_SMART_PTR(RotationTransition);
 
+/**
+ * \addtogroup Transition
+ * @{
+ */
+
 /**
  * \~chinese
  * @brief 旋转过渡动画
@@ -55,4 +60,6 @@ private:
     float rotation_;
 };
 
+/** @} */
+
 }  // namespace kiwano