3 files changed, 19 insertions, 5 deletions
diff --git a/include/d/d_tag_processor.h b/include/d/d_tag_processor.h
index c643e3f3..970382db 100644
--- a/include/d/d_tag_processor.h
+++ b/include/d/d_tag_processor.h
@@ -47,7 +47,7 @@ public:
     void fn_800B61D0(nw4r::ut::Rect *rect, nw4r::ut::PrintContext<wchar_t> *ctx, u8 cmdLen, wchar_t *ptr);
     void setFramesLeftOnPause(nw4r::ut::Rect *rect, nw4r::ut::PrintContext<wchar_t> *ctx, u8 cmdLen, wchar_t *ptr);
     void fn_800B5500(u8 cmdLen, wchar_t *ptr);
-    void fn_800B5540(wchar_t *ptr);
+    void enableChangeBtn(wchar_t *ptr);
     void fn_800B60E0(u8 cmdLen, wchar_t *ptr);
     void fn_800B6110(u8 cmdLen, wchar_t *ptr);
     void fn_800B6140(u8 cmdLen, wchar_t *ptr);
@@ -217,6 +217,8 @@ private:
         TAG_CMD_OPTION_2 = 0x10002,
         TAG_CMD_OPTION_3 = 0x10003,
 
+        TAG_CMD_CHANGE_BTN = 0x10011,
+
         TAG_CMD_WRITE_HERONAME = 0x20000,
         TAG_CMD_WRITE_ITEM = 0x20001,
         TAG_CMD_WRITE_STRING_ARG = 0x20002,
diff --git a/include/d/lyt/d_lyt_boss_caption.h b/include/d/lyt/d_lyt_boss_caption.h
index 65436c12..5da6ca56 100644
--- a/include/d/lyt/d_lyt_boss_caption.h
+++ b/include/d/lyt/d_lyt_boss_caption.h
@@ -17,12 +17,19 @@ public:
         field_0x646 = 0;
     }
 
+    static void unk_inline2() {
+        if (sInstance != nullptr) {
+            sInstance->field_0x647 = 1;
+        }
+    }
+
 private:
     static dLytBossCaption_c *sInstance;
 
     u8 _0x00[0x645 - 0x00];
     u8 field_0x645;
     u8 field_0x646;
+    u8 field_0x647;
 };
 
 #endif
diff --git a/include/d/lyt/msg_window/d_lyt_msg_window.h b/include/d/lyt/msg_window/d_lyt_msg_window.h
index e0e0e2e1..d3cb9ae3 100644
--- a/include/d/lyt/msg_window/d_lyt_msg_window.h
+++ b/include/d/lyt/msg_window/d_lyt_msg_window.h
@@ -10,6 +10,7 @@
 #include "m/m_vec.h"
 #include "s/s_State.hpp"
 #include "sized_string.h"
+#include "toBeSorted/d_flow_mgr.h"
 
 // Forward declarations required for vtable order
 class dLytMsgWindowTalk_c;
@@ -84,6 +85,9 @@ public:
         return mNameCopy;
     }
 
+    bool fn_80117310() const;
+    void fn_80117360();
+    void fn_80117380();
     const char *fn_80117390(bool) const;
 
     // This function appears to be related to a compiler quirk.
@@ -118,17 +122,18 @@ public:
         return mTextOptionSelection;
     }
 
-    void onFlag0x820(u16 flag) {
-        field_0x820 |= flag;
+    void enableChangeBtn(u16 flag) {
+        mValidChangeBtnMask |= flag;
     }
 
 private:
     bool setTextToDisplay(const wchar_t *text);
     void createSubMsgManager(u8 type);
     void removeSubMsgManagers();
-    bool fn_8011A5D0() const;
+    bool checkChangeBtnTrig();
 
     static dLytMsgWindow_c *sInstance;
+    static dFlowMgrBase_c *sFlowMgr;
 
     STATE_FUNC_DECLARE(dLytMsgWindow_c, Invisible);
     STATE_FUNC_DECLARE(dLytMsgWindow_c, In);
@@ -203,7 +208,7 @@ private:
     /* 0x81D */ u8 field_0x81D;
     /* 0x81E */ u8 field_0x81E;
 
-    /* 0x820 */ u16 field_0x820;
+    /* 0x820 */ u16 mValidChangeBtnMask;
     /* 0x824 */ s32 mNumOptions;
     /* 0x828 */ dLytMsgWindowCharData *field_0x828;