diff --git a/app/src/main/java/com/medithings/vesiscan/ui/views/monitoring/PlacementGuideView.kt b/app/src/main/java/com/medithings/vesiscan/ui/views/monitoring/PlacementGuideView.kt
index ba4957d..30b3bb0 100644
--- a/app/src/main/java/com/medithings/vesiscan/ui/views/monitoring/PlacementGuideView.kt
+++ b/app/src/main/java/com/medithings/vesiscan/ui/views/monitoring/PlacementGuideView.kt
@@ -1315,7 +1315,10 @@ fun PlacementGuideView(appState: AppState) {
                     .shadow(12.dp, RoundedCornerShape(14.dp))
             ) {
                 Column(modifier = Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                    // Method A/B/C
+                    // Method A/B/C/D
+                    // 2026-08-04: METHOD_D 옵션 추가 (기존 A/B/C 만 있어 default D 상태에서
+                    //   버튼 하이라이트 없어 사용자가 "적용 안됨" 으로 인지하던 UX 버그).
+                    //   cloud-mvp 는 D 있었음 · demo-final 은 누락되어 있었음.
                     var selectedMethod by remember { mutableStateOf(com.medithings.vesiscan.managers.GreenZoneConstants.detectionMethod) }
                     Row(modifier = Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
                         Text("Detection", fontSize = 14.sp, fontWeight = FontWeight.SemiBold)
@@ -1323,9 +1326,15 @@ fun PlacementGuideView(appState: AppState) {
                         val methods = listOf(
                             com.medithings.vesiscan.managers.DetectionMethod.METHOD_A to "A",
                             com.medithings.vesiscan.managers.DetectionMethod.METHOD_B to "B",
-                            com.medithings.vesiscan.managers.DetectionMethod.METHOD_C to "C"
+                            com.medithings.vesiscan.managers.DetectionMethod.METHOD_C to "C",
+                            com.medithings.vesiscan.managers.DetectionMethod.METHOD_D to "D",
+                        )
+                        val colors = listOf(
+                            Color(0xFF9C27B0),   // A: purple
+                            MlPrimary,           // B: blue
+                            Color(0xFFFF5722),   // C: deep orange
+                            Color(0xFFAB47BC),   // D: magenta (cloud-mvp 와 통일)
                         )
-                        val colors = listOf(Color(0xFF9C27B0), MlPrimary, Color(0xFFFF5722))
                         Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
                             methods.forEachIndexed { idx, (m, label) ->
                                 val sel = selectedMethod == m