diff --git a/app.go b/app.go
index 1916d3f..fa03d70 100644
--- a/app.go
+++ b/app.go
@@ -303,9 +303,16 @@ func (a *App) EnableVideoMenus() {
 	timelineMenu.AddText("Rename Clip", keys.CmdOrCtrl("r"), func(cd *menu.CallbackData) {
 		wruntime.EventsEmit(a.ctx, video.EVT_OPEN_RENAME_CLIP_MODAL)
 	})
-	timelineMenu.AddText("Mark/Unmark Lossless Export", keys.Key("m"), func(cd *menu.CallbackData) {
+	timelineMenu.AddText("Mark/Unmark Clip (Lossless Export)", keys.Key("m"), func(cd *menu.CallbackData) {
 		wruntime.EventsEmit(a.ctx, video.EVT_TOGGLE_LOSSLESS)
 	})
+	timelineMenu.AddText("Mark All Clips (Lossless Export)", keys.Shift("m"), func(cd *menu.CallbackData) {
+		wruntime.EventsEmit(a.ctx, video.EVT_MARK_ALL_LOSSLESS)
+	})
+	timelineMenu.AddText("Unmark All Clips (Lossless Export)", keys.Shift("u"), func(cd *menu.CallbackData) {
+		wruntime.EventsEmit(a.ctx, video.EVT_UNMARK_ALL_LOSSLESS)
+	})
+
 	timelineMenu.AddText("Change Project", keys.Shift("b"), func(cd *menu.CallbackData) {
 		wruntime.EventsEmit(a.ctx, video.EVT_CHANGE_ROUTE, "main")
 	})
diff --git a/frontend/src/components/Timeline.svelte b/frontend/src/components/Timeline.svelte
index 9a3eb15..5aee12e 100644
--- a/frontend/src/components/Timeline.svelte
+++ b/frontend/src/components/Timeline.svelte
@@ -18,6 +18,8 @@
     InsertInterval,
     RenameVideoNode,
     ToggleLossless,
+    MarkAllLossless,
+    UnmarkAllLossless,
   } from "../../wailsjs/go/main/App";
   import RenameIcon from "../icons/RenameIcon.svelte";
   import SearchList from "../components/SearchList.svelte";
@@ -69,6 +71,8 @@
     setTrackTime,
     renameClipInTrack,
     toggleLosslessMarkofClip,
+    markAllLossless,
+    unmarkAllLossless,
     resetTrackStore,
   } = trackStore;
 
@@ -396,10 +400,32 @@
       ToggleLossless($videoNodePos)
         .then(() => {
           toggleLosslessMarkofClip(0, $videoNodePos);
+          setActionMsg("-- MARKED --");
         })
         .catch((err) => setActionMsg(err));
     }
   });
+
+  EventsOn("evt_mark_all_lossless", () => {
+    MarkAllLossless()
+      .then(() => {
+        markAllLossless();
+
+        setActionMsg("-- MARKED CLIPS --");
+      })
+      .catch((err) => setActionMsg(err));
+  });
+
+  EventsOn("evt_unmark_all_lossless", () => {
+    UnmarkAllLossless()
+      .then(() => {
+        unmarkAllLossless();
+
+        setActionMsg("-- UNMARKED CLIPS --");
+      })
+      .catch((err) => setActionMsg(err));
+  });
+
   onDestroy(() => {
     EventsOff(
       "evt_open_rename_clip_modal",
@@ -411,6 +437,8 @@
       "evt_zoom_timeline",
       "evt_saved_timeline",
       "evt_toggle_lossless",
+      "evt_mark_all_lossless",
+      "evt_unmark_all_lossless",
     );
     resetTrackStore();
     resetToolingStore();
diff --git a/frontend/src/stores.ts b/frontend/src/stores.ts
index f07cb28..31a3dbf 100644
--- a/frontend/src/stores.ts
+++ b/frontend/src/stores.ts
@@ -234,6 +234,26 @@ function createTracksStore() {
     });
   };
 
+  const markAllLossless = () => {
+    update((tracks) => {
+      if (!tracks[0]) return tracks;
+      for (let track of tracks[0]) {
+        track.losslessexport = true;
+      }
+      return tracks;
+    });
+  };
+
+  const unmarkAllLossless = () => {
+    update((tracks) => {
+      if (!tracks[0]) return tracks;
+      for (let track of tracks[0]) {
+        track.losslessexport = false;
+      }
+      return tracks;
+    });
+  };
+
   const resetTrackStore = () => {
     set([]);
     setTrackTime(0);
@@ -250,6 +270,8 @@ function createTracksStore() {
     removeRIDReferencesFromTrack,
     renameClipInTrack,
     toggleLosslessMarkofClip,
+    markAllLossless,
+    unmarkAllLossless,
     trackDuration,
     resetTrackStore,
   };
diff --git a/frontend/wailsjs/go/main/App.d.ts b/frontend/wailsjs/go/main/App.d.ts
index 7b56d7a..decd5f3 100755
--- a/frontend/wailsjs/go/main/App.d.ts
+++ b/frontend/wailsjs/go/main/App.d.ts
@@ -40,6 +40,8 @@ export function LoadProjectFiles():Promise<Array<main.Video>>;
 
 export function LoadTimeline():Promise<video.Timeline>;
 
+export function MarkAllLossless():Promise<void>;
+
 export function OpenFile(arg1:string):Promise<void>;
 
 export function ReadGaharaWorkspace():Promise<Array<string>>;
@@ -63,3 +65,5 @@ export function SetProjectDirectory(arg1:string):Promise<void>;
 export function SplitInterval(arg1:string,arg2:number,arg3:number,arg4:number):Promise<Array<video.VideoNode>>;
 
 export function ToggleLossless(arg1:number):Promise<void>;
+
+export function UnmarkAllLossless():Promise<void>;
diff --git a/frontend/wailsjs/go/main/App.js b/frontend/wailsjs/go/main/App.js
index 7e46ff3..571cbe3 100755
--- a/frontend/wailsjs/go/main/App.js
+++ b/frontend/wailsjs/go/main/App.js
@@ -74,6 +74,10 @@ export function LoadTimeline() {
   return window['go']['main']['App']['LoadTimeline']();
 }
 
+export function MarkAllLossless() {
+  return window['go']['main']['App']['MarkAllLossless']();
+}
+
 export function OpenFile(arg1) {
   return window['go']['main']['App']['OpenFile'](arg1);
 }
@@ -121,3 +125,7 @@ export function SplitInterval(arg1, arg2, arg3, arg4) {
 export function ToggleLossless(arg1) {
   return window['go']['main']['App']['ToggleLossless'](arg1);
 }
+
+export function UnmarkAllLossless() {
+  return window['go']['main']['App']['UnmarkAllLossless']();
+}
diff --git a/internal/video/video.go b/internal/video/video.go
index 66851a3..b7a7804 100644
--- a/internal/video/video.go
+++ b/internal/video/video.go
@@ -52,6 +52,10 @@ const (
 	EVT_INSERTCLIP_EDIT = "evt_insertclip_edit"
 	//EVT_TOGGLE_LOSSLESS: toggles the video node status to be exported as lossless
 	EVT_TOGGLE_LOSSLESS = "evt_toggle_lossless"
+	// EVT_MARK_ALL_LOSSLESS: marks all the video nodes as lossless
+	EVT_MARK_ALL_LOSSLESS = "evt_mark_all_lossless"
+	//EVT_UNMARK_ALL_LOSSLESS: umarks all the video nodes marked as lossless
+	EVT_UNMARK_ALL_LOSSLESS = "evt_unmark_all_lossless"
 	// EVT_EXECUTE_EDIT: execute the current edit
 	EVT_EXECUTE_EDIT = "evt_execute_edit"
 	// EVT_PLAY_TRACK: plays the clips on the track (starting from current pos and clip time)
@@ -242,6 +246,31 @@ func (tl *Timeline) ToggleLossless(pos int) error {
 	return nil
 }
 
+func (tl *Timeline) MarkAllLossless() error {
+	if len(tl.VideoNodes) == 0 {
+		return fmt.Errorf("there are no video clips to mark")
+	}
+
+	for i := range tl.VideoNodes {
+		tl.VideoNodes[i].LosslessExport = true
+	}
+
+	return nil
+}
+
+func (tl *Timeline) UnmarkAllLossless() error {
+	if len(tl.VideoNodes) == 0 {
+		return fmt.Errorf("there are no video clips to mark")
+	}
+
+	for i := range tl.VideoNodes {
+		tl.VideoNodes[i].LosslessExport = false
+	}
+
+	return nil
+
+}
+
 func (tl *Timeline) Split(eventType string, pos int, start, end float64) ([]VideoNode, error) {
 	nodes := []VideoNode{}
 	if pos < 0 || pos >= len(tl.VideoNodes) {
diff --git a/video.go b/video.go
index 13f7661..623fb3a 100644
--- a/video.go
+++ b/video.go
@@ -346,6 +346,14 @@ func (a *App) ToggleLossless(pos int) error {
 	return a.Timeline.ToggleLossless(pos)
 }
 
+func (a *App) MarkAllLossless() error {
+	return a.Timeline.MarkAllLossless()
+}
+
+func (a *App) UnmarkAllLossless() error {
+	return a.Timeline.UnmarkAllLossless()
+}
+
 // ResetTimeline: cleanup timeline state in memory
 func (a *App) ResetTimeline() {
 	a.Timeline = video.NewTimeline()