diff --git a/tools/etcpmon/etcpmon_gui.c b/tools/etcpmon/etcpmon_gui.c
index 47eee1dc..1105ac64 100644
--- a/tools/etcpmon/etcpmon_gui.c
+++ b/tools/etcpmon/etcpmon_gui.c
@@ -20,7 +20,8 @@
 //#pragma comment(lib, "user32.lib")
 //#pragma comment(lib, "gdi32.lib")
 #define WINDOW_WIDTH    1000
-#define WINDOW_HEIGHT   1810
+#define WINDOW_HEIGHT   1300
+#define WINDOW_CLIENT_W 1250
 #define UPDATE_INTERVAL 10   /* 50ms → 20 samples per second */
 /* Global app pointer for callbacks */
 static struct etcpmon_app* g_app = NULL;
@@ -115,7 +116,7 @@ HWND etcpmon_gui_create_window(struct etcpmon_app* app) {
         "ETCP Monitor",
         WS_OVERLAPPEDWINDOW & ~WS_THICKFRAME,
         CW_USEDEFAULT, CW_USEDEFAULT,
-        WINDOW_WIDTH, WINDOW_HEIGHT,
+        WINDOW_CLIENT_W, WINDOW_HEIGHT,
         NULL, NULL, app->hInstance, app
     );
     
@@ -727,15 +728,14 @@ static void CreateControls(struct etcpmon_app* app) {
     }
 
     /* ========================================================================
-     * Debug Levels section
+     * Debug Levels section — right column
      * ======================================================================== */
     {
-        int dy = 1255;
+        int dy = 485;
         app->hDebugGroupBox = CreateWindowExA(0, "BUTTON", "Debug Levels",
             WS_CHILD | WS_VISIBLE | BS_GROUPBOX,
-            10, dy, WINDOW_WIDTH - 20, 545, hWnd, (HMENU)IDC_STATIC, hInst, NULL);
+            1005, dy, 220, 545, hWnd, (HMENU)IDC_STATIC, hInst, NULL);
         dy += 20;
-        const char* global_texts[6] = { "NONE", "ERROR", "WARN", "INFO", "DEBUG", "TRACE" };
         const char* header_texts[6] = {
             "N\r\nO\r\nN\r\nE", "E\r\nR\r\nR\r\nO\r\nR", "W\r\nA\r\nR\r\nN",
             "I\r\nN\r\nF\r\nO", "D\r\nE\r\nB\r\nU\r\nG", "T\r\nR\r\nA\r\nC\r\nE"
@@ -750,32 +750,32 @@ static void CreateControls(struct etcpmon_app* app) {
         app->debug_cat_count = ncat;
 
         CreateWindowExA(0, "STATIC", "Global:", WS_CHILD | WS_VISIBLE,
-            20, dy + 2, 50, 20, hWnd, (HMENU)IDC_STATIC, hInst, NULL);
+            1015, dy + 2, 55, 20, hWnd, (HMENU)IDC_STATIC, hInst, NULL);
         for (int l = 0; l < 6; l++) {
-            int lx = 75 + l * 85;
-            app->hDebugGlobalRadio[l] = CreateWindowExA(0, "BUTTON", global_texts[l],
+            int lx = 1080 + l * 22;
+            app->hDebugGlobalRadio[l] = CreateWindowExA(0, "BUTTON", "",
                 WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON,
-                lx, dy, 80, 20, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_GLOBAL_BASE + l), hInst, NULL);
+                lx, dy, 20, 20, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_GLOBAL_BASE + l), hInst, NULL);
         }
 
         dy += 22;
         for (int l = 0; l < 6; l++) {
-            int lx = 75 + l * 85;
+            int lx = 1080 + l * 22;
             app->hDebugHeaderEdit[l] = CreateWindowExA(WS_EX_CLIENTEDGE, "EDIT", header_texts[l],
                 WS_CHILD | WS_VISIBLE | ES_READONLY | ES_CENTER | ES_MULTILINE,
-                lx, dy, 80, 60, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_HEADER_BASE + l), hInst, NULL);
+                lx, dy, 22, 60, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_HEADER_BASE + l), hInst, NULL);
         }
 
         dy += 65;
         for (int r = 0; r < ncat; r++) {
             app->hDebugCatLabel[r] = CreateWindowExA(0, "STATIC", cat_names[r],
                 WS_CHILD | WS_VISIBLE | SS_LEFT | SS_CENTERIMAGE,
-                20, dy + 1, 50, 16, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_NAME_BASE + r), hInst, NULL);
+                1015, dy + 1, 60, 16, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_NAME_BASE + r), hInst, NULL);
             for (int l = 0; l < 6; l++) {
-                int lx = 75 + l * 85;
+                int lx = 1080 + l * 22;
                 app->hDebugCatRadio[r][l] = CreateWindowExA(0, "BUTTON", "",
                     WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON,
-                    lx, dy, 80, 16, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_ROW_BASE + r * 8 + l), hInst, NULL);
+                    lx, dy, 20, 16, hWnd, (HMENU)(UINT_PTR)(IDC_DEBUG_ROW_BASE + r * 8 + l), hInst, NULL);
             }
             dy += 18;
         }