diff --git a/README.md b/README.md
index 7516391..466de4e 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ rust bevy light field camera array tooling
 - [X] person segmentation post-process (batch across streams)
 - [X] async segmentation model inference
 - [X] foreground extraction post-process and visualization mode
-- [ ] recording session timeline viewer
+- [X] recording session viewer
 - [ ] camera array calibration (extrinsics, intrinsics, color)
 - [ ] camera position visualization
 - [ ] 3d reconstruction dataset preparation
diff --git a/tools/viewer.rs b/tools/viewer.rs
index f94ea61..075010d 100644
--- a/tools/viewer.rs
+++ b/tools/viewer.rs
@@ -195,6 +195,7 @@ fn main() {
                 Update,
                 (
                     offline_viewer,
+                    press_arrow_key_frame_navigation,
                 ),
             );
     }
@@ -517,7 +518,18 @@ fn press_s_stop_recording(
 }
 
 
-// TODO: add pipeline viewer /w left/right arrow keys and UI controls to switch between frames
+fn press_arrow_key_frame_navigation(
+    mut frame_index: ResMut<FrameIndex>,
+    keys: Res<ButtonInput<KeyCode>>,
+) {
+    if keys.just_pressed(KeyCode::ArrowLeft) {
+        frame_index.0 = frame_index.0.saturating_sub(1);
+    }
+
+    if keys.just_pressed(KeyCode::ArrowRight) {
+        frame_index.0 += 1;
+    }
+}