diff --git a/proto/anki/scheduler.proto b/proto/anki/scheduler.proto
index 581f6d046..ecd68fa3e 100644
--- a/proto/anki/scheduler.proto
+++ b/proto/anki/scheduler.proto
@@ -311,6 +311,7 @@ message NextCardDataResponse {
     string css = 5;
     string body_class = 6;
     bool autoplay = 7;
+    bool marked = 13;
     optional TypedAnswer typed_answer = 12;
 
     repeated card_rendering.AVTag question_av_tags = 8;
diff --git a/qt/aqt/mediasrv.py b/qt/aqt/mediasrv.py
index b63518db0..02a6c6796 100644
--- a/qt/aqt/mediasrv.py
+++ b/qt/aqt/mediasrv.py
@@ -769,6 +769,8 @@ exposed_backend_list = [
     "get_field_names",
     "get_note",
     "remove_notes",
+    "add_note_tags",
+    "remove_note_tags",
     # NotetypesService
     "get_notetype_names",
     "get_change_notetype_info",
diff --git a/rslib/src/scheduler/service/mod.rs b/rslib/src/scheduler/service/mod.rs
index d7bdae42d..796fbec54 100644
--- a/rslib/src/scheduler/service/mod.rs
+++ b/rslib/src/scheduler/service/mod.rs
@@ -404,6 +404,7 @@ impl crate::services::SchedulerService for Collection {
         if let Some(next_card) = next_card {
             let cid = next_card.card.id;
             let deck_config = self.deck_config_for_card(&next_card.card)?;
+            let note = self.get_note(next_card.card.note_id.into())?;
 
             let render = self.render_existing_card(cid, false, true)?;
             let show_due = self.get_config_bool(BoolKey::ShowIntervalsAboveAnswerButtons);
@@ -454,7 +455,6 @@ impl crate::services::SchedulerService for Collection {
 
             let typed_answer = typed_answer_parent_node
                 .map(|field| -> Result<(String, String)> {
-                    let note = self.get_note(next_card.card.note_id.into())?;
                     let notetype = self
                         .get_notetype(note.notetype_id.into())?
                         .or_not_found(note.notetype_id)?;
@@ -468,6 +468,8 @@ impl crate::services::SchedulerService for Collection {
                 })
                 .transpose()?;
 
+            let marked = note.tags.contains(&"marked".to_string());
+
             Ok(NextCardDataResponse {
                 next_card: Some(NextCardData {
                     queue: Some(queue.into()),
@@ -482,6 +484,7 @@ impl crate::services::SchedulerService for Collection {
                         text: answer.1,
                         args: answer.0,
                     }),
+                    marked,
 
                     // Filled by python
                     front: "".to_string(),
diff --git a/ts/routes/reviewer/+page.svelte b/ts/routes/reviewer/+page.svelte
index 3eb014f18..517419267 100644
--- a/ts/routes/reviewer/+page.svelte
+++ b/ts/routes/reviewer/+page.svelte
@@ -20,6 +20,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     });
     $: cardData = state.cardData;
     $: flag = $cardData?.queue?.cards[0].card?.flags;
+    $: marked = $cardData?.marked;
 </script>
 
 <div>
@@ -31,6 +32,10 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     <div id="_flag" style:color={`var(--flag-${flag})`}>⚑</div>
 {/if}
 
+{#if marked}
+    <div id="_mark">★</div>
+{/if}
+
 <style>
     div {
         height: 100vh;
diff --git a/ts/routes/reviewer/reviewer-bottom/More.svelte b/ts/routes/reviewer/reviewer-bottom/More.svelte
index 236d9b55f..5220a9a02 100644
--- a/ts/routes/reviewer/reviewer-bottom/More.svelte
+++ b/ts/routes/reviewer/reviewer-bottom/More.svelte
@@ -63,7 +63,11 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
         "hr",
         // Notes
-        { name: tr.studyingMarkNote(), shortcut: "*", onClick: todo },
+        {
+            name: tr.studyingMarkNote(),
+            shortcut: "*",
+            onClick: state.toggleMarked.bind(state),
+        },
         {
             name: tr.studyingBuryNote(),
             shortcut: "=",
diff --git a/ts/routes/reviewer/reviewer.ts b/ts/routes/reviewer/reviewer.ts
index 8c3a6abe7..fcd2d8f1b 100644
--- a/ts/routes/reviewer/reviewer.ts
+++ b/ts/routes/reviewer/reviewer.ts
@@ -6,6 +6,7 @@ import {
     type NextCardDataResponse_NextCardData,
 } from "@generated/anki/scheduler_pb";
 import {
+    addNoteTags,
     buryOrSuspendCards,
     compareAnswer,
     getConfigJson,
@@ -14,6 +15,7 @@ import {
     playAvtags,
     redo,
     removeNotes,
+    removeNoteTags,
     setConfigJson,
     undo,
 } from "@generated/backend";
@@ -129,6 +131,23 @@ export class ReviewerState {
         this.displayMenu("Options");
     }
 
+    public toggleMarked() {
+        if (this._cardData && this.currentCard?.card?.noteId) {
+            const noteIds = [this.currentCard.card.noteId];
+            if (this._cardData.marked) {
+                removeNoteTags({ noteIds, tags: "marked" });
+            } else {
+                addNoteTags({ noteIds, tags: "marked" });
+            }
+            this.cardData.update($cardData => {
+                if ($cardData) {
+                    $cardData.marked = !$cardData.marked;
+                }
+                return $cardData;
+            });
+        }
+    }
+
     public showTooltip(message: string) {
         clearTimeout(this.tooltipMessageTimeout);
         this.tooltipMessage.set(message);