diff --git a/client/dive-common/components/CameraRegistration/RegistrationTools.vue b/client/dive-common/components/CameraRegistration/RegistrationTools.vue
index a1771a1e1..49785bd77 100644
--- a/client/dive-common/components/CameraRegistration/RegistrationTools.vue
+++ b/client/dive-common/components/CameraRegistration/RegistrationTools.vue
@@ -502,10 +502,24 @@ export default defineComponent({
       () => correspondences.value.length > 0 || hasLoadedTransform.value,
     );
 
+    // Short L/R labels keep the toggle from overflowing on long camera
+    // names; the full names stay available as the button tooltip.
     const alignmentModeItems = computed(() => [
-      { text: 'Picking', value: 'original', disabled: false },
-      { text: `${camLeft.value ?? 'A'} → ${camRight.value ?? 'B'}`, value: 'AtoB', disabled: !hasTransform.value },
-      { text: `${camRight.value ?? 'B'} → ${camLeft.value ?? 'A'}`, value: 'BtoA', disabled: !hasTransform.value },
+      {
+        text: 'Picking', title: undefined, value: 'original', disabled: false,
+      },
+      {
+        text: 'L → R',
+        title: `${camLeft.value ?? 'A'} → ${camRight.value ?? 'B'}`,
+        value: 'AtoB',
+        disabled: !hasTransform.value,
+      },
+      {
+        text: 'R → L',
+        title: `${camRight.value ?? 'B'} → ${camLeft.value ?? 'A'}`,
+        value: 'BtoA',
+        disabled: !hasTransform.value,
+      },
     ]);
 
     function setTransformType(type: TransformType) {
@@ -535,6 +549,18 @@ export default defineComponent({
       return entries.length ? entries.join(' · ') : 'present (no displayable fields)';
     });
 
+    /**
+     * Short L/R label for a camera in the active pair (falls back to the full
+     * name for anything else, though the readout only ever sees pair
+     * cameras) -- keeps the monospace cursor readout from overflowing on
+     * long camera names, matching the Overlay Warp toggle's labels.
+     */
+    function shortCameraLabel(cam: string): string {
+      if (cam === camLeft.value) return 'L';
+      if (cam === camRight.value) return 'R';
+      return cam;
+    }
+
     /** Live cursor readout text: this camera's coord, and its linked point in the other camera. */
     const cursorReadout = computed(() => {
       const cursor = registration.cursorCoord.value;
@@ -543,12 +569,12 @@ export default defineComponent({
       }
       const [x, y] = cursor.coord;
       const other = registration.linkedPoint(cursor.camera, cursor.coord);
-      const here = `${cursor.camera}: (${x.toFixed(1)}, ${y.toFixed(1)})`;
+      const here = `${shortCameraLabel(cursor.camera)}: (${x.toFixed(1)}, ${y.toFixed(1)})`;
       if (!other) {
         return here;
       }
       const [ox, oy] = other.coord;
-      return `${here} -> ${other.camera}: (${ox.toFixed(1)}, ${oy.toFixed(1)})`;
+      return `${here} -> ${shortCameraLabel(other.camera)}: (${ox.toFixed(1)}, ${oy.toFixed(1)})`;
     });
 
     /**
@@ -1339,6 +1365,7 @@ export default defineComponent({
         :key="item.value"
         :value="item.value"
         :disabled="item.disabled"
+        :title="item.title"
         small
         class="flex-grow-1"
         style="text-transform: none;"
diff --git a/client/dive-common/components/Viewer.vue b/client/dive-common/components/Viewer.vue
index cbc470dd8..6897cdf84 100644
--- a/client/dive-common/components/Viewer.vue
+++ b/client/dive-common/components/Viewer.vue
@@ -333,20 +333,20 @@ export default defineComponent({
     const showUserSettingsDialog = ref(false);
 
     // When the Camera Registration panel opens, minimize the workspace chrome
-    // to give the picking view more room: collapse the left type-filter
-    // sidebar. The bottom controls deliberately stay as they are -- the
-    // timeline hosts the registration-frame marker row, which is most useful
-    // exactly while this panel is open. This is a soft default -- the normal
-    // sidebar toggle still works while registering -- and whatever layout the
-    // user had before is restored on close.
+    // to give the picking view more room: hide the type-filter sidebar,
+    // whichever side it is on. Bottom especially -- it competes for the same
+    // vertical room the two picking panes want. The bottom controls
+    // deliberately stay as they are -- the timeline hosts the
+    // registration-frame marker row, which is most useful exactly while this
+    // panel is open. This is a soft default -- the normal sidebar toggle
+    // still works while registering -- and whatever layout the user had
+    // before is restored on close.
     const registrationActive = computed(() => context.state.active === RegistrationToolsVue.name);
     let preRegistrationSidebarMode: 'left' | 'bottom' | 'collapsed' | null = null;
     watch(registrationActive, (active) => {
       if (active) {
         preRegistrationSidebarMode = sidebarMode.value;
-        if (sidebarMode.value === 'left') {
-          sidebarMode.value = 'collapsed';
-        }
+        sidebarMode.value = 'collapsed';
       } else if (preRegistrationSidebarMode !== null) {
         sidebarMode.value = preRegistrationSidebarMode;
         preRegistrationSidebarMode = null;
@@ -2372,6 +2372,7 @@ export default defineComponent({
       cycleSidebarMode,
       sidebarModeIcon,
       sidebarModeTooltip,
+      registrationActive,
       bottomRightPanelView,
       toggleBottomRightPanel,
       colorBy,
@@ -2543,7 +2544,14 @@ export default defineComponent({
       </span>
       <v-spacer />
       <template #extension>
+        <!--
+          No sidebar while registering: the picking panes want the room, and
+          the bottom layout in particular doesn't lay them out usably. The
+          panel collapses the sidebar on open and restores it on close, so
+          the toggle is simply not offered in between.
+        -->
         <v-tooltip
+          v-if="!registrationActive"
           bottom
         >
           <template #activator="{ on }">
diff --git a/client/platform/desktop/frontend/components/Export.vue b/client/platform/desktop/frontend/components/Export.vue
index a1516b693..2b041ee6b 100644
--- a/client/platform/desktop/frontend/components/Export.vue
+++ b/client/platform/desktop/frontend/components/Export.vue
@@ -409,9 +409,12 @@ export default defineComponent({
                   depressed
                   block
                   class="my-1"
+                  :title="`Registration: ${file.camera}${file.destination ? ` → ${file.destination}` : ''}`"
                   @click="exportRegistration(file.camera)"
                 >
-                  Registration: {{ file.camera }}{{ file.destination ? ` → ${file.destination}` : '' }}
+                  <span class="registration-export-btn__label">
+                    Registration: {{ file.camera }}{{ file.destination ? ` → ${file.destination}` : '' }}
+                  </span>
                 </v-btn>
               </v-col>
             </v-row>
@@ -454,4 +457,13 @@ export default defineComponent({
   font-weight: 600;
   line-height: 1.3;
 }
+
+/* Long camera names overflow the block button otherwise; the full label is
+   still available via the button's native title tooltip on hover. */
+.registration-export-btn__label {
+  min-width: 0;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
 </style>
diff --git a/client/platform/web-girder/views/Export.vue b/client/platform/web-girder/views/Export.vue
index 1f774185f..bbf4fa786 100644
--- a/client/platform/web-girder/views/Export.vue
+++ b/client/platform/web-girder/views/Export.vue
@@ -548,9 +548,12 @@ export default defineComponent({
                     depressed
                     block
                     class="my-1"
+                    :title="`Registration: ${file.camera}${file.destination ? ` → ${file.destination}` : ''}`"
                     @click="exportRegistration(file.camera)"
                   >
-                    Registration: {{ file.camera }}{{ file.destination ? ` → ${file.destination}` : '' }}
+                    <span class="registration-export-btn__label">
+                      Registration: {{ file.camera }}{{ file.destination ? ` → ${file.destination}` : '' }}
+                    </span>
                   </v-btn>
                 </v-col>
               </v-row>
@@ -622,4 +625,13 @@ export default defineComponent({
   overflow-y: auto;
   overflow-x: hidden;
 }
+
+/* Long camera names overflow the block button otherwise; the full label is
+   still available via the button's native title tooltip on hover. */
+.registration-export-btn__label {
+  min-width: 0;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
 </style>
diff --git a/client/src/components/annotators/VideoAnnotator.vue b/client/src/components/annotators/VideoAnnotator.vue
index 35a591526..2ea308f17 100644
--- a/client/src/components/annotators/VideoAnnotator.vue
+++ b/client/src/components/annotators/VideoAnnotator.vue
@@ -305,6 +305,13 @@ export default defineComponent({
     // is switching from number -> undefined, or vice versa.
     function pendingUpdate() {
       data.syncedFrame = Math.round(video.currentTime * props.frameRate);
+      // The aligned-view warp is a canvas snapshot of this <video> element,
+      // redrawn only on an imageRevision bump -- unlike the native pane,
+      // which the browser keeps live on its own. loadedmetadata bumps it
+      // once for the initial frame; without another bump here, a scrub
+      // leaves the warp showing whatever the video displayed mid-seek
+      // (often a black frame) instead of the frame the seek landed on.
+      data.imageRevision += 1;
     }
     video.addEventListener('loadedmetadata', loadedMetadata);
     video.addEventListener('seeked', pendingUpdate);
diff --git a/client/src/components/layerManager/useLayerManagerAlignedView.ts b/client/src/components/layerManager/useLayerManagerAlignedView.ts
index 237dff206..20c49ca82 100644
--- a/client/src/components/layerManager/useLayerManagerAlignedView.ts
+++ b/client/src/components/layerManager/useLayerManagerAlignedView.ts
@@ -108,21 +108,24 @@ export default function useLayerManagerAlignedView(options: {
     return mapped;
   }
 
+  /** This camera's currently displayed frame image/video, or null. */
+  function resolveCameraImage() {
+    try {
+      return getCameraQuadMedia(
+        (cam) => aggregateController.value.getController(cam),
+        camera,
+      );
+    } catch {
+      // Controllers may be cleared mid-poll during a dataset reload.
+      return null;
+    }
+  }
+
   // Created before the annotation layers in LayerManager so its geojs layer
   // z-orders beneath boxes/polygons/text (geojs stacks layers by creation order).
   const alignedImageLayer = new AlignedImageLayer({
     annotator,
-    getImage: () => {
-      try {
-        return getCameraQuadMedia(
-          (cam) => aggregateController.value.getController(cam),
-          camera,
-        );
-      } catch {
-        // Controllers may be cleared mid-poll during a dataset reload.
-        return null;
-      }
-    },
+    getImage: resolveCameraImage,
     getTransform: () => alignedDisplayTransform.value,
     // Follows the camera-lock toggle, the existing control for "the camera may
     // recenter itself". Never while creating/editing geometry, where
@@ -151,8 +154,15 @@ export default function useLayerManagerAlignedView(options: {
     // seek itself (blanking promptly when a frame has no image, e.g. an
     // aligned-timeline gap); the element the seek eventually loads arrives
     // through the imageRevision watch below.
+    //
+    // Video panes skip this: a video-backed camera never actually hits that
+    // gap case (see VideoAnnotator's seek(), unreachable by construction),
+    // and the browser hasn't decoded the target frame yet at this instant --
+    // repainting here only catches the stale pre-seek frame, flickering
+    // before the imageRevision watch below repaints with the frame the seek
+    // actually lands on. Image panes still need the immediate repaint.
     watch(frameNumberRef, () => {
-      if (alignedDisplayTransform.value) {
+      if (alignedDisplayTransform.value && resolveCameraImage()?.kind !== 'video') {
         alignedImageLayer.update();
       }
     });