diff --git a/dicom-viewer/package.json b/dicom-viewer/package.json
index 4b7cfce..b83d8dc 100644
--- a/dicom-viewer/package.json
+++ b/dicom-viewer/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc && vite build",
+    "build": "tsc && vite build && cp dist/index.js /home/ross/rad/rad/rad/static/dv3d/index.js",
     "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
     "preview": "vite preview"
   },
diff --git a/dicom-viewer/src/App.tsx b/dicom-viewer/src/App.tsx
index 5616d17..5826c20 100644
--- a/dicom-viewer/src/App.tsx
+++ b/dicom-viewer/src/App.tsx
@@ -1,5 +1,4 @@
 import { useEffect, useRef, useCallback, useState } from "react"
-import cornerstoneDICOMImageLoader from "@cornerstonejs/dicom-image-loader"
 import {
   RenderingEngine,
   Enums,
@@ -15,6 +14,7 @@ import { readDicomElementExplicit } from "dicom-parser"
 import { volumeLoader } from '@cornerstonejs/core';
 import { metaData } from '@cornerstonejs/core';
 import * as dicomParser from "dicom-parser";
+import cornerstoneDICOMImageLoader from "@cornerstonejs/dicom-image-loader"
 
 import { NoLabelArrowAnnotateTool } from "./NoLabelArrowAnnotateTool";
 import { render } from "@cornerstonejs/tools/tools/displayTools/Labelmap/labelmapDisplay"
@@ -176,47 +176,48 @@ function App({ container_id, imageStacks, autoCacheStack, annotationJson, viewer
     () => Array(MAX_VIEWPORTS).fill(0)
   );
 
+  const [stackOrderModified, setStackOrderModified] = useState(false);
   const [loadingState, setLoadingState] = useState<null | "annotations" | "viewerState">(null);
   // Load annotations and viewer state from props if provided
-useEffect(() => {
-  let didCancel = false;
-  // Wait until availableStacks and viewportImageIds are loaded (i.e., app is ready)
-  if (annotationJson || viewerState) {
+  useEffect(() => {
+    let didCancel = false;
+    // Wait until availableStacks and viewportImageIds are loaded (i.e., app is ready)
+    if (annotationJson || viewerState) {
       setLoadingState(annotationJson ? "annotations" : "viewerState");
-    // Use a short delay to ensure Cornerstone is initialized and viewports are ready
-    const timeout = setTimeout(() => {
-      if (didCancel) return;
-      const apiKey = container_id || "default";
-      if (annotationJson) {
-        try {
-          const fn = window[`importAnnotations_${apiKey}`] || window.importAnnotations;
-          if (typeof fn === "function") {
-            fn(annotationJson);
+      // Use a short delay to ensure Cornerstone is initialized and viewports are ready
+      const timeout = setTimeout(() => {
+        if (didCancel) return;
+        const apiKey = container_id || "default";
+        if (annotationJson) {
+          try {
+            const fn = window[`importAnnotations_${apiKey}`] || window.importAnnotations;
+            if (typeof fn === "function") {
+              fn(annotationJson);
+            }
+          } catch (e) {
+            console.error("Failed to import annotations from prop:", e);
           }
-        } catch (e) {
-          console.error("Failed to import annotations from prop:", e);
         }
-      }
-      if (viewerState) {
-        try {
-          const fn = window[`importViewerState_${apiKey}`] || window.importViewerState;
-          if (typeof fn === "function") {
-            fn(viewerState);
+        if (viewerState) {
+          try {
+            const fn = window[`importViewerState_${apiKey}`] || window.importViewerState;
+            if (typeof fn === "function") {
+              fn(viewerState);
+            }
+          } catch (e) {
+            console.error("Failed to import viewer state from prop:", e);
           }
-        } catch (e) {
-          console.error("Failed to import viewer state from prop:", e);
         }
-      }
         setLoadingState(null);
-    }, 800); // 500ms delay, adjust as needed
+      }, 2000); // 500ms delay, adjust as needed
 
-    return () => {
-      didCancel = true;
-      clearTimeout(timeout);
-      setLoadingState(null);
-    };
-  }
-}, [annotationJson, viewerState, container_id]);
+      return () => {
+        didCancel = true;
+        clearTimeout(timeout);
+        setLoadingState(null);
+      };
+    }
+  }, [annotationJson, viewerState, container_id]);
 
   // Load available stacks on mount
   useEffect(() => {
@@ -318,6 +319,7 @@ useEffect(() => {
         }
         return sortedIds;
       });
+      setStackOrderModified(true);
       return next;
     });
   };
@@ -371,7 +373,7 @@ useEffect(() => {
   const prevViewportProps = useRef<Record<number, any>>({});
   const prevScrollIndices = useRef<Record<number, number>>({});
 
-  const [orderBySliceLocation, setOrderBySliceLocation] = useState(true);
+  const [orderBySliceLocation, setOrderBySliceLocation] = useState(false);
 
   const [altEnablesReferenceCursors, setAltEnablesReferenceCursors] = useState(true);
 
@@ -420,7 +422,7 @@ useEffect(() => {
   const [ctrlMouseToolBindings, setCtrlMouseToolBindings] = useState({
     Primary: LengthTool.toolName,
     Auxiliary: ProbeTool.toolName,
-    Secondary: ArrowAnnotateTool.toolName,
+    Secondary: NoLabelArrowAnnotateTool.toolName,
   })
 
   // Track if Ctrl is pressed
@@ -780,9 +782,8 @@ useEffect(() => {
         running.current = true;
         await csRenderInit();
         await csToolsInit(
-          { showSVGCursors: true, }
         );
-        dicomImageLoaderInit({ maxWebWorkers: 1 });
+        dicomImageLoaderInit();
       }
 
 
@@ -1077,6 +1078,25 @@ useEffect(() => {
     return () => document.removeEventListener("mousedown", handleClick);
   }, [presetsOpen]);
 
+useEffect(() => {
+  const preventExtraButtonDefault = (e: MouseEvent) => {
+    // 4th button: button === 3, 5th button: button === 4
+    if (e.button === 3 || e.button === 4) {
+      e.preventDefault();
+      //e.stopPropagation();
+      return false;
+    }
+  };
+  window.addEventListener("mousedown", preventExtraButtonDefault, true);
+  window.addEventListener("mouseup", preventExtraButtonDefault, true);
+  window.addEventListener("auxclick", preventExtraButtonDefault, true);
+  return () => {
+    window.removeEventListener("mousedown", preventExtraButtonDefault, true);
+    window.removeEventListener("mouseup", preventExtraButtonDefault, true);
+    window.removeEventListener("auxclick", preventExtraButtonDefault, true);
+  };
+}, []);
+
   useEffect(() => {
     const handleContextMenu = (e: MouseEvent) => {
       e.preventDefault();
@@ -1144,45 +1164,47 @@ useEffect(() => {
     };
   }, [setAvailableStacks, setViewportImageIds, setSelectedStackIdx, setLoadedImageIdsAndCacheMeta]);
 
-  useEffect(() => {
-    if (!orderBySliceLocation) return;
+useEffect(() => {
+  if (!orderBySliceLocation) return;
 
-    // Only sort if all metadata is loaded for all viewports
-    const allLoaded = viewportImageIds.every(imageIds =>
-      !imageIds || imageIds.length === 0 ||
-      imageIds.every(id => !!metaData.get("imagePlaneModule", id))
-    );
-    if (!allLoaded) return;
+  // Only sort if all metadata is loaded for all viewports
+  const allLoaded = viewportImageIds.every(imageIds =>
+    !imageIds || imageIds.length === 0 ||
+    imageIds.every(id => !!metaData.get("imagePlaneModule", id))
+  );
+  if (!allLoaded) return;
 
-    setViewportImageIds(prev => {
-      const next = prev.map(imageIds => {
-        if (!imageIds || imageIds.length === 0) return imageIds;
+  setViewportImageIds(prev => {
+    let modified = false;
+    const next = prev.map(imageIds => {
+      if (!imageIds || imageIds.length === 0) return imageIds;
 
-        const withSliceLoc = imageIds.map(id => ({
-          imageId: id,
-          sliceLoc: (() => {
-            const meta = metaData.get('imagePlaneModule', id);
-            return meta && meta.sliceLocation !== undefined ? Number(meta.sliceLocation) : null;
-          })(),
-        }));
+      const withSliceLoc = imageIds.map(id => ({
+        imageId: id,
+        sliceLoc: (() => {
+          const meta = metaData.get('imagePlaneModule', id);
+          return meta && meta.sliceLocation !== undefined ? Number(meta.sliceLocation) : null;
+        })(),
+      }));
 
-        const sorted = [...withSliceLoc].sort((a, b) => {
-          if (a.sliceLoc !== null && b.sliceLoc !== null) {
-            return a.sliceLoc - b.sliceLoc;
-          }
-          return a.imageId.localeCompare(b.imageId);
-        });
-
-        const sortedIds = sorted.map(obj => obj.imageId);
-        if (JSON.stringify(sortedIds) === JSON.stringify(imageIds)) {
-          return imageIds;
+      const sorted = [...withSliceLoc].sort((a, b) => {
+        if (a.sliceLoc !== null && b.sliceLoc !== null) {
+          return a.sliceLoc - b.sliceLoc;
         }
-        return sortedIds;
+        return a.imageId.localeCompare(b.imageId);
       });
-      return next;
-    });
-  }, [orderBySliceLocation, availableStacks]);
 
+      const sortedIds = sorted.map(obj => obj.imageId);
+      if (JSON.stringify(sortedIds) !== JSON.stringify(imageIds)) {
+        modified = true;
+        return sortedIds;
+      }
+      return imageIds;
+    });
+    if (modified) setStackOrderModified(true);
+    return next;
+  });
+}, [orderBySliceLocation, availableStacks]);
 
   function updateActiveReferenceLineViewport(mainToolGroup: cornerstoneTools.Types.IToolGroup) {
     // Ensure the main tool group is defined (it won't be during setup)
@@ -1197,26 +1219,106 @@ useEffect(() => {
       mainToolGroup.setToolDisabled(ReferenceLinesTool.toolName)
     }
   }
+
+
+  // Inside App component
+  function resetViewer() {
+    const renderingEngine = renderingEngineRef.current;
+    if (renderingEngine) {
+      for (let i = 0; i < MAX_VIEWPORTS; i++) {
+        const viewport = renderingEngine.getViewport(`CT_${i}`);
+        if (viewport) {
+          viewport.resetCamera?.();
+          viewport.resetProperties?.();
+          viewport.render?.();
+        }
+      }
+    }
+    if (cornerstoneTools?.annotation?.state?.removeAllAnnotations) {
+      cornerstoneTools.annotation.state.removeAllAnnotations();
+    }
+  }
+
+  function truncateStack(lower: number, upper: number) {
+    // Only allow when 1 viewport and 1 stack is loaded
+    console.log("Truncating stack from", lower, "to", upper);
+    console.log(stackOrderModified)
+    if (
+      viewportGrid.rows !== 1 ||
+      viewportGrid.cols !== 1 ||
+      availableStacks.length !== 1 ||
+      !viewportImageIds[0] ||
+      viewportImageIds[0].length === 0  ||
+      stackOrderModified
+    ) {
+      alert("Truncation is only allowed when a single stack is loaded in a single viewport (and the order has not been modified in the viewer).");
+      return false;
+    }
+
+    const stack = availableStacks[0];
+    const imageIds = stack.imageIds;
+
+    // Validate bounds
+    if (
+      lower < 0 ||
+      upper >= imageIds.length ||
+      lower >= upper
+    ) {
+      alert("Invalid truncation bounds.");
+      return false;
+    }
+
+    // Truncate the stack and update state
+    const truncatedImageIds = imageIds.slice(lower, upper + 1);
+    setAvailableStacks([{ ...stack, imageIds: truncatedImageIds }]);
+    setViewportImageIds([truncatedImageIds]);
+    setSelectedStackIdx([0]);
+    // Optionally reset scroll position, overlays, etc.
+
+    // Optionally, force a re-render or reset the viewport
+    const renderingEngine = renderingEngineRef.current;
+    if (renderingEngine) {
+      const viewport = renderingEngine.getViewport("CT_0");
+      if (viewport && typeof viewport.setStack === "function") {
+        viewport.setStack(truncatedImageIds);
+        viewport.setImageIdIndex?.(0);
+        viewport.render?.();
+      }
+    }
+
+    return true;
+  }
+  function getCurrentStackPosition(viewportIdx: number = 0): number | null {
+    const renderingEngine = renderingEngineRef.current;
+    if (!renderingEngine) return null;
+    const viewport = renderingEngine.getViewport(`CT_${viewportIdx}`);
+    if (!viewport || typeof viewport.getCurrentImageIdIndex !== "function") return null;
+    return viewport.getCurrentImageIdIndex();
+  }
+
   useEffect(() => {
     const apiKey = container_id || "default";
 
-  function jumpToSliceByImageId(viewportIdx: number, imageId: string) {
-    const renderingEngine = renderingEngineRef.current;
-    if (!renderingEngine) return;
-    const viewport = renderingEngine.getViewport(`CT_${viewportIdx}`);
-    if (!viewport || typeof viewport.getImageIds !== "function") return;
-    const imageIds = viewport.getImageIds();
-    // Some stacks may have imageIds with or without "wadouri:" prefix, so normalize for comparison
-    const normImageIds = imageIds.map(id => id.replace(/^wadouri:/, ""));
-    const normTarget = imageId.replace(/^wadouri:/, "");
-    const idx = normImageIds.indexOf(normTarget);
-    if (idx !== -1 && typeof viewport.setImageIdIndex === "function") {
-      csUtilities.jumpToSlice(viewport.element, { imageIndex: idx });
-      updateOverlay(viewportIdx, viewport);
+    function jumpToSliceByImageId(viewportIdx: number, imageId: string) {
+      const renderingEngine = renderingEngineRef.current;
+      if (!renderingEngine) return;
+      const viewport = renderingEngine.getViewport(`CT_${viewportIdx}`);
+      if (!viewport || typeof viewport.getImageIds !== "function") return;
+      const imageIds = viewport.getImageIds();
+      // Some stacks may have imageIds with or without "wadouri:" prefix, so normalize for comparison
+      const normImageIds = imageIds.map(id => id.replace(/^wadouri:/, ""));
+      const normTarget = imageId.replace(/^wadouri:/, "");
+      const idx = normImageIds.indexOf(normTarget);
+      if (idx !== -1 && typeof viewport.setImageIdIndex === "function") {
+        csUtilities.jumpToSlice(viewport.element, { imageIndex: idx });
+        updateOverlay(viewportIdx, viewport);
+      }
     }
-  }
     // Attach to window with a unique name
     window[`jumpToSliceByImageId_${apiKey}`] = jumpToSliceByImageId;
+    window[`resetViewer_${apiKey}`] = resetViewer;
+    window[`truncateStack_${apiKey}`] = truncateStack;
+    window[`getCurrentStackPosition_${apiKey}`] = getCurrentStackPosition;
 
 
     // Export the current viewer state as JSON
@@ -1564,6 +1666,9 @@ useEffect(() => {
       window[`importLegacyAnnotations_${apiKey}`] = undefined;
       window[`importLegacyViewport_${apiKey}`] = undefined;
       window[`jumpToSliceByImageId_${apiKey}`] = undefined;
+      window[`resetViewer_${apiKey}`] = undefined;
+      window[`truncateStack_${apiKey}`] = undefined;
+      window[`getCurrentStackPosition_${apiKey}`] = undefined;
     };
   }, [
     viewportGrid,
@@ -1778,7 +1883,6 @@ useEffect(() => {
             </span>
           )}
         </button>
-        // Annotations buttons
         {viewportModes[i] === "stack" && (() => {
           // Get all annotations for this stack
           const imageIds = viewportImageIds[i];
@@ -1959,7 +2063,6 @@ useEffect(() => {
             </div>
           );
         })()}
-// ...existing code...
         {/* Overlay info (bottom left of viewport) */}
         <div
           style={{
@@ -2179,7 +2282,7 @@ useEffect(() => {
             </div>
           </div>
         )}
-        {isVisible && availableStacks.length > 1 && (
+        {isVisible && (availableStacks.length > 1 || !viewportImageIds[i] || viewportImageIds[i].length === 0) && (
           <div
             style={{
               position: "absolute",
diff --git a/dicom-viewer/vite.config.ts b/dicom-viewer/vite.config.ts
index d414a17..d5075fb 100644
--- a/dicom-viewer/vite.config.ts
+++ b/dicom-viewer/vite.config.ts
@@ -45,4 +45,15 @@ export default defineConfig(({ command }) => ({
     },
   },
   base: command === "build" ? "/static/dv3d/" : "/",
+  build: {
+    rollupOptions: {
+      output: {
+        entryFileNames: `index.js`,
+        chunkFileNames: `[name].js`,
+        assetFileNames: `[name][extname]`,
+      },
+    },
+    outDir: "dist",
+    emptyOutDir: true,
+  },
 }))
\ No newline at end of file