diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index a041d4c..58922d5 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -48,9 +48,12 @@ export default function App() {
     language,
     isTranscribing,
     transcriptionStatus,
+    markInTime,
+    markOutTime,
     loadVideo,
     setProjectFilePath,
     setBackendUrl,
+    clearMarkRange,
     setTranscription,
     setTranscriptionModel,
     setTranscribing,
@@ -333,6 +336,17 @@ export default function App() {
   };
 
   const handleCut = () => {
+    if (markInTime !== null && markOutTime !== null) {
+      const startTime = Math.min(markInTime, markOutTime);
+      const endTime = Math.max(markInTime, markOutTime);
+      if (endTime - startTime >= 0.01) {
+        addCutRange(startTime, endTime);
+        setActivePanel('zones');
+      }
+      clearMarkRange();
+      return;
+    }
+
     if (selectedWordIndices.length > 0) {
       // If words are selected, apply cut immediately
       const sorted = [...selectedWordIndices].sort((a, b) => a - b);
@@ -349,6 +363,17 @@ export default function App() {
   };
 
   const handleMute = () => {
+    if (markInTime !== null && markOutTime !== null) {
+      const startTime = Math.min(markInTime, markOutTime);
+      const endTime = Math.max(markInTime, markOutTime);
+      if (endTime - startTime >= 0.01) {
+        addMuteRange(startTime, endTime);
+        setActivePanel('zones');
+      }
+      clearMarkRange();
+      return;
+    }
+
     if (selectedWordIndices.length > 0) {
       // If words are selected, apply mute immediately
       const sorted = [...selectedWordIndices].sort((a, b) => a - b);
@@ -365,6 +390,17 @@ export default function App() {
   };
 
   const handleGain = () => {
+    if (markInTime !== null && markOutTime !== null) {
+      const startTime = Math.min(markInTime, markOutTime);
+      const endTime = Math.max(markInTime, markOutTime);
+      if (endTime - startTime >= 0.01) {
+        addGainRange(startTime, endTime, gainModeDb);
+        setActivePanel('zones');
+      }
+      clearMarkRange();
+      return;
+    }
+
     if (selectedWordIndices.length > 0) {
       const sorted = [...selectedWordIndices].sort((a, b) => a - b);
       const startTime = words[sorted[0]].start;
@@ -379,6 +415,17 @@ export default function App() {
   };
 
   const handleSpeed = () => {
+    if (markInTime !== null && markOutTime !== null) {
+      const startTime = Math.min(markInTime, markOutTime);
+      const endTime = Math.max(markInTime, markOutTime);
+      if (endTime - startTime >= 0.01) {
+        addSpeedRange(startTime, endTime, speedModeValue);
+        setActivePanel('zones');
+      }
+      clearMarkRange();
+      return;
+    }
+
     if (selectedWordIndices.length > 0) {
       const sorted = [...selectedWordIndices].sort((a, b) => a - b);
       const startTime = words[sorted[0]].start;
diff --git a/frontend/src/components/WaveformTimeline.tsx b/frontend/src/components/WaveformTimeline.tsx
index 4dee0b1..31deff7 100644
--- a/frontend/src/components/WaveformTimeline.tsx
+++ b/frontend/src/components/WaveformTimeline.tsx
@@ -278,11 +278,13 @@ export default function WaveformTimeline({
   const [showMuteZones, setShowMuteZones] = useState(true);
   const [showGainZones, setShowGainZones] = useState(true);
   const [showSpeedZones, setShowSpeedZones] = useState(true);
+  const [showAdjustedTimeline, setShowAdjustedTimeline] = useState(false);
 
   const sourceDuration = duration || waveformDataRef.current?.duration || 0;
+  const timelineCutRanges = showAdjustedTimeline ? cutRanges : [];
   const { segments: timelineSegments, displayDuration } = useMemo(
-    () => buildTimelineSegments(sourceDuration, cutRanges),
-    [sourceDuration, cutRanges],
+    () => buildTimelineSegments(sourceDuration, timelineCutRanges),
+    [sourceDuration, timelineCutRanges],
   );
 
   useEffect(() => {
@@ -447,15 +449,16 @@ export default function WaveformTimeline({
       const x1 = (sourceToDisplayTime(range.start, timelineSegments, dur) - scroll) * pxPerSec;
       const x2 = (sourceToDisplayTime(range.end, timelineSegments, dur) - scroll) * pxPerSec;
       const isSelected = selectedZone?.type === 'cut' && selectedZone.id === range.id;
-      
-      ctx.fillStyle = isSelected ? 'rgba(239, 68, 68, 0.5)' : 'rgba(239, 68, 68, 0.3)';
+
+      ctx.fillStyle = isSelected ? 'rgba(239, 68, 68, 0.62)' : 'rgba(239, 68, 68, 0.46)';
       ctx.fillRect(x1, waveTop, x2 - x1, waveH);
+
+      // Keep cut ranges clearly visible even when not selected.
+      ctx.strokeStyle = isSelected ? '#ef4444' : 'rgba(239, 68, 68, 0.9)';
+      ctx.lineWidth = isSelected ? 2.8 : 1.8;
+      ctx.strokeRect(x1, waveTop, x2 - x1, waveH);
       
       if (isSelected) {
-        ctx.strokeStyle = '#ef4444';
-        ctx.lineWidth = 2;
-        ctx.strokeRect(x1, waveTop, x2 - x1, waveH);
-        
         // Draw resize handles
         ctx.fillStyle = '#ef4444';
         ctx.beginPath();
@@ -634,6 +637,7 @@ export default function WaveformTimeline({
     gainMode,
     speedMode,
     selectedZone,
+    showAdjustedTimeline,
     markInTime,
     markOutTime,
     displayDuration,
@@ -1184,35 +1188,47 @@ export default function WaveformTimeline({
           {markOutTime !== null && <span className="text-[10px] text-yellow-300">O {markOutTime.toFixed(2)}s</span>}
         </div>
         <div className="flex items-center gap-2">
-          <button
-            onClick={() => setShowCutZones((v) => !v)}
-            className={`px-1.5 py-0.5 rounded text-[10px] border ${showCutZones ? 'border-red-500/60 text-red-300 bg-red-500/10' : 'border-editor-border text-editor-text-muted'}`}
-            title="Toggle cut zones"
-          >
-            Cut
-          </button>
-          <button
-            onClick={() => setShowMuteZones((v) => !v)}
-            className={`px-1.5 py-0.5 rounded text-[10px] border ${showMuteZones ? 'border-blue-500/60 text-blue-300 bg-blue-500/10' : 'border-editor-border text-editor-text-muted'}`}
-            title="Toggle mute zones"
-          >
-            Mute
-          </button>
-          <button
-            onClick={() => setShowGainZones((v) => !v)}
-            className={`px-1.5 py-0.5 rounded text-[10px] border ${showGainZones ? 'border-amber-500/60 text-amber-300 bg-amber-500/10' : 'border-editor-border text-editor-text-muted'}`}
-            title="Toggle gain zones"
-          >
-            Gain
-          </button>
-          <button
-            onClick={() => setShowSpeedZones((v) => !v)}
-            className={`px-1.5 py-0.5 rounded text-[10px] border ${showSpeedZones ? 'border-emerald-500/60 text-emerald-300 bg-emerald-500/10' : 'border-editor-border text-editor-text-muted'}`}
-            title="Toggle speed zones"
-          >
-            Speed
-          </button>
-          <span className="text-[10px] text-editor-text-muted">
+          <label className="flex items-center gap-1 text-[10px] text-editor-text-muted select-none">
+            <input
+              type="checkbox"
+              checked={showAdjustedTimeline}
+              onChange={(e) => setShowAdjustedTimeline(e.target.checked)}
+              className="h-3 w-3 rounded border-editor-border bg-editor-surface"
+            />
+            Show adjusted timeline
+          </label>
+          <div className="flex items-center gap-2 pl-2 ml-1 border-l border-editor-border/80">
+            <span className="text-[10px] text-editor-text-muted">Show zones</span>
+            <button
+              onClick={() => setShowCutZones((v) => !v)}
+              className={`px-1.5 py-0.5 rounded text-[10px] border ${showCutZones ? 'border-red-500/60 text-red-300 bg-red-500/10' : 'border-editor-border text-editor-text-muted'}`}
+              title="Toggle cut zones"
+            >
+              Cut
+            </button>
+            <button
+              onClick={() => setShowMuteZones((v) => !v)}
+              className={`px-1.5 py-0.5 rounded text-[10px] border ${showMuteZones ? 'border-blue-500/60 text-blue-300 bg-blue-500/10' : 'border-editor-border text-editor-text-muted'}`}
+              title="Toggle mute zones"
+            >
+              Mute
+            </button>
+            <button
+              onClick={() => setShowGainZones((v) => !v)}
+              className={`px-1.5 py-0.5 rounded text-[10px] border ${showGainZones ? 'border-amber-500/60 text-amber-300 bg-amber-500/10' : 'border-editor-border text-editor-text-muted'}`}
+              title="Toggle gain zones"
+            >
+              Gain
+            </button>
+            <button
+              onClick={() => setShowSpeedZones((v) => !v)}
+              className={`px-1.5 py-0.5 rounded text-[10px] border ${showSpeedZones ? 'border-emerald-500/60 text-emerald-300 bg-emerald-500/10' : 'border-editor-border text-editor-text-muted'}`}
+              title="Toggle speed zones"
+            >
+              Speed
+            </button>
+          </div>
+          <span className="text-[10px] text-editor-text-muted pl-2 ml-1 border-l border-editor-border/80">
             Scroll · Ctrl+Scroll to zoom
           </span>
         </div>
diff --git a/frontend/src/components/ZoneEditor.tsx b/frontend/src/components/ZoneEditor.tsx
index 548db04..ecb0bab 100644
--- a/frontend/src/components/ZoneEditor.tsx
+++ b/frontend/src/components/ZoneEditor.tsx
@@ -2,6 +2,13 @@ import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { useEditorStore } from '../store/editorStore';
 import { Trash2, Scissors, Volume2, SlidersHorizontal, Gauge, Play } from 'lucide-react';
 
+function formatTimelineLikeTime(secs: number): string {
+  const m = Math.floor(secs / 60);
+  const s = secs % 60;
+  if (m > 0) return `${m}:${String(Math.floor(s)).padStart(2, '0')}.${Math.floor((s % 1) * 10)}`;
+  return `${s.toFixed(1)}s`;
+}
+
 export default function ZoneEditor() {
   const [viewMode, setViewMode] = useState<'all' | 'cut' | 'mute' | 'gain' | 'speed'>('all');
   const [focusedZone, setFocusedZone] = useState<{ type: 'cut' | 'mute' | 'gain' | 'speed'; id: string } | null>(null);
@@ -256,7 +263,7 @@ export default function ZoneEditor() {
                   >
                     <div className="flex-1 min-w-0">
                       <div className="font-medium truncate">
-                        {range.start.toFixed(2)}s – {range.end.toFixed(2)}s
+                        {formatTimelineLikeTime(range.start)} - {formatTimelineLikeTime(range.end)}
                       </div>
                       <div className="text-editor-text-muted text-[10px]">{range.id}</div>
                     </div>
@@ -293,7 +300,7 @@ export default function ZoneEditor() {
                   >
                     <div className="flex-1 min-w-0">
                       <div className="font-medium truncate">
-                        {range.start.toFixed(2)}s – {range.end.toFixed(2)}s
+                        {formatTimelineLikeTime(range.start)} - {formatTimelineLikeTime(range.end)}
                       </div>
                       <div className="text-editor-text-muted text-[10px]">{range.id}</div>
                     </div>
@@ -357,7 +364,7 @@ export default function ZoneEditor() {
                   >
                     <div className="flex-1 min-w-0">
                       <div className="font-medium truncate">
-                        {range.start.toFixed(2)}s – {range.end.toFixed(2)}s
+                        {formatTimelineLikeTime(range.start)} - {formatTimelineLikeTime(range.end)}
                       </div>
                       <div className="text-editor-text-muted text-[10px]">
                         {range.gainDb > 0 ? '+' : ''}{range.gainDb.toFixed(1)} dB
@@ -407,7 +414,7 @@ export default function ZoneEditor() {
                   >
                     <div className="flex-1 min-w-0">
                       <div className="font-medium truncate">
-                        {range.start.toFixed(2)}s – {range.end.toFixed(2)}s
+                        {formatTimelineLikeTime(range.start)} - {formatTimelineLikeTime(range.end)}
                       </div>
                       <div className="text-editor-text-muted text-[10px]">
                         {range.speed.toFixed(2)}x