diff --git a/backend/node_menu.py b/backend/node_menu.py
index d12c127..0ac9274 100644
--- a/backend/node_menu.py
+++ b/backend/node_menu.py
@@ -12,18 +12,19 @@ from typing import Any
 
 
 MENU_LAYOUT: dict[str, list[str]] = {
-    "Add": [
+    "Input": [
         "Image",
         "ImageDemo",
         "Folder",
-        "ColorMap",
         "Number",
         "RangeSlider",
         "Coordinate",
         "CoordinatePair",
-        "Font",
     ],
-    "Output": [
+    "Display": [
+        "ColorMap",
+        "Font",
+        "ColormapAdjust",
         "PreviewImage",
         "ValueDisplay",
         "View3D",
@@ -36,11 +37,10 @@ MENU_LAYOUT: dict[str, list[str]] = {
         "Annotations",
         "AngleMeasure",
     ],
-    "Modify": [
+    "Geometry": [
         "CropResizeField",
         "RotateField",
         "FlipField",
-        "ColormapAdjust",
     ],
     "Filter": [
         "GaussianFilter",
@@ -50,25 +50,31 @@ MENU_LAYOUT: dict[str, list[str]] = {
         "FFTFilter2D",
         "ScarRemoval",
     ],
-    "Frequency": [
-        "PSDF",
+    "Spectral": [
         "FFT2D",
         "InverseFFT2D",
+        "FFTFilter1D",
+        "FFTFilter2D",
+        "ACF",
+        "PSDF",
     ],
-    "Flatten": [
+    "Level & Correct": [
         "FixZero",
-        "LineCorrection",
         "PlaneLevelField",
         "PolyLevelField",
         "FacetLevelField",
+        "LineCorrection",
+        "ScarRemoval",
     ],
     "Measure": [
+        "AngleMeasure",
         "CrossSection",
         "Histogram",
         "Cursors",
         "Curvature",
         "FractalDimension",
         "ACF",
+        "PSDF",
         "Statistics",
         "Stats",
     ],
@@ -78,12 +84,14 @@ MENU_LAYOUT: dict[str, list[str]] = {
         "MaskMorphology",
         "MaskInvert",
         "MaskOperations",
-    ],
-    "Grains": [
-        "GrainAnalysis",
         "GrainDistanceTransform",
         "WatershedSegmentation",
     ],
+    "Grains": [
+        "GrainDistanceTransform",
+        "WatershedSegmentation",
+        "GrainAnalysis",
+    ],
 }
 
 
@@ -91,11 +99,17 @@ _CATEGORY_ORDER = {category: index for index, category in enumerate(MENU_LAYOUT)
 _NODE_METADATA: dict[str, dict[str, Any]] = {}
 for category, class_names in MENU_LAYOUT.items():
     for node_order, class_name in enumerate(class_names):
-        _NODE_METADATA[class_name] = {
+        metadata = _NODE_METADATA.setdefault(class_name, {
             "category": category,
             "category_order": _CATEGORY_ORDER[category],
             "menu_order": node_order,
-        }
+            "menu_categories": [],
+        })
+        metadata["menu_categories"].append({
+            "category": category,
+            "category_order": _CATEGORY_ORDER[category],
+            "menu_order": node_order,
+        })
 
 
 def get_menu_metadata(class_name: str) -> dict[str, Any]:
@@ -107,4 +121,9 @@ def get_menu_metadata(class_name: str) -> dict[str, Any]:
         "category": "Unsorted",
         "category_order": len(_CATEGORY_ORDER),
         "menu_order": 10_000,
+        "menu_categories": [{
+            "category": "Unsorted",
+            "category_order": len(_CATEGORY_ORDER),
+            "menu_order": 10_000,
+        }],
     }
diff --git a/backend/node_registry.py b/backend/node_registry.py
index 022d661..c1b99da 100644
--- a/backend/node_registry.py
+++ b/backend/node_registry.py
@@ -47,6 +47,7 @@ def get_node_info(class_name: str) -> dict[str, Any]:
         "category": menu_metadata["category"],
         "category_order": menu_metadata["category_order"],
         "menu_order": menu_metadata["menu_order"],
+        "menu_categories": list(menu_metadata.get("menu_categories", [])),
         "input": input_types,
         "input_order": {k: list(v.keys()) for k, v in input_types.items()},
         "output": list(cls.RETURN_TYPES),
diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index bd15a00..661f932 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -404,8 +404,16 @@ function canStartCanvasRightDragZoom(target) {
 }
 
 function compareMenuNodes(a, b) {
-  const orderA = Number.isFinite(a?.def?.menu_order) ? a.def.menu_order : Number.MAX_SAFE_INTEGER;
-  const orderB = Number.isFinite(b?.def?.menu_order) ? b.def.menu_order : Number.MAX_SAFE_INTEGER;
+  const orderA = Number.isFinite(a?.menu_order)
+    ? a.menu_order
+    : Number.isFinite(a?.def?.menu_order)
+      ? a.def.menu_order
+      : Number.MAX_SAFE_INTEGER;
+  const orderB = Number.isFinite(b?.menu_order)
+    ? b.menu_order
+    : Number.isFinite(b?.def?.menu_order)
+      ? b.def.menu_order
+      : Number.MAX_SAFE_INTEGER;
   if (orderA !== orderB) return orderA - orderB;
 
   const nameA = (a?.def?.display_name || a?.className || '').toLowerCase();
@@ -615,19 +623,37 @@ function ContextMenu({ x, y, nodeDefs, onAdd, onClose, filterType, filterDirecti
           if (!hasMatch) continue;
         }
       }
-      const cat = def.category || 'uncategorized';
-      if (!cats[cat]) {
-        cats[cat] = {
-          name: cat,
-          order: Number.isFinite(def.category_order) ? def.category_order : Number.MAX_SAFE_INTEGER,
-          items: [],
-        };
+      const menuCategories = Array.isArray(def.menu_categories) && def.menu_categories.length > 0
+        ? def.menu_categories
+        : [{
+            category: def.category || 'uncategorized',
+            category_order: def.category_order,
+            menu_order: def.menu_order,
+          }];
+
+      for (const menuCategory of menuCategories) {
+        const cat = menuCategory?.category || def.category || 'uncategorized';
+        if (!cats[cat]) {
+          cats[cat] = {
+            name: cat,
+            order: Number.isFinite(menuCategory?.category_order)
+              ? menuCategory.category_order
+              : Number.MAX_SAFE_INTEGER,
+            items: [],
+          };
+        }
+        cats[cat].order = Math.min(
+          cats[cat].order,
+          Number.isFinite(menuCategory?.category_order)
+            ? menuCategory.category_order
+            : Number.MAX_SAFE_INTEGER,
+        );
+        cats[cat].items.push({
+          className,
+          def,
+          menu_order: Number.isFinite(menuCategory?.menu_order) ? menuCategory.menu_order : def.menu_order,
+        });
       }
-      cats[cat].order = Math.min(
-        cats[cat].order,
-        Number.isFinite(def.category_order) ? def.category_order : Number.MAX_SAFE_INTEGER,
-      );
-      cats[cat].items.push({ className, def });
     }
     return Object.values(cats)
       .map((category) => ({
@@ -642,10 +668,15 @@ function ContextMenu({ x, y, nodeDefs, onAdd, onClose, filterType, filterDirecti
     if (!search.trim()) return null;
     const q = search.toLowerCase();
     const results = [];
+    const seen = new Set();
     for (const category of categories) {
       for (const { className, def } of category.items) {
+        if (seen.has(className)) continue;
         const name = (def.display_name || className).toLowerCase();
-        if (name.includes(q)) results.push({ className, def });
+        if (name.includes(q)) {
+          results.push({ className, def });
+          seen.add(className);
+        }
       }
     }
     return results;
diff --git a/frontend/src/constants.js b/frontend/src/constants.js
index 719c7f7..3ec208a 100644
--- a/frontend/src/constants.js
+++ b/frontend/src/constants.js
@@ -33,13 +33,16 @@ export const TYPE_COLORS = {
 };
 
 export const CAT_COLORS = {
-  io:        '#37474f',
-  filters:   '#1a237e',
-  modify:    '#0f766e',
-  level:     '#1b5e20',
-  analysis:  '#4a148c',
+  Input:           '#37474f',
+  Display:         '#212121',
+  Overlay:         '#0f766e',
+  Geometry:        '#0d9488',
+  Filter:          '#1a237e',
+  Spectral:        '#4c1d95',
+  'Level & Correct': '#1b5e20',
+  Measure:         '#4a148c',
+  Mask:            '#7c2d12',
   Grains:    '#bf360c',
-  display:   '#212121',
 };
 
 export const SOCKET_COMPATIBILITY = {
diff --git a/tests/test_nodes.py b/tests/test_nodes.py
index 46f7e27..ca15e78 100644
--- a/tests/test_nodes.py
+++ b/tests/test_nodes.py
@@ -287,7 +287,7 @@ def test_flip_field():
         overlays=[markup_overlay, annotation_overlay],
     )
 
-    assert get_node_info("FlipField")["category"] == "Modify"
+    assert get_node_info("FlipField")["category"] == "Geometry"
 
     flipped_x, = node.process(field, axis="x")
     assert np.array_equal(flipped_x.data, np.flipud(data))
@@ -569,7 +569,7 @@ def test_facet_level():
 
     node = FacetLevelField()
     plane_node = PlaneLevelField()
-    assert get_node_info("FacetLevelField")["category"] == "Flatten"
+    assert get_node_info("FacetLevelField")["category"] == "Level & Correct"
 
     N = 96
     yy, xx = np.mgrid[0:N, 0:N]
@@ -749,7 +749,7 @@ def test_line_correction():
     from backend.nodes.line_correction import LineCorrection
 
     node = LineCorrection()
-    assert get_node_info("LineCorrection")["category"] == "Flatten"
+    assert get_node_info("LineCorrection")["category"] == "Level & Correct"
 
     rows = 96
     cols = 128
@@ -815,7 +815,9 @@ def test_scar_removal():
     from backend.nodes.scar_removal import ScarRemoval
 
     node = ScarRemoval()
-    assert get_node_info("ScarRemoval")["category"] == "Filter"
+    info = get_node_info("ScarRemoval")
+    assert info["category"] == "Filter"
+    assert {entry["category"] for entry in info["menu_categories"]} == {"Filter", "Level & Correct"}
 
     rows = 96
     cols = 128
@@ -874,7 +876,9 @@ def test_angle_measure():
     from backend.data_types import ImageData
 
     node = AngleMeasure()
-    assert get_node_info("AngleMeasure")["category"] == "Overlay"
+    info = get_node_info("AngleMeasure")
+    assert info["category"] == "Overlay"
+    assert {entry["category"] for entry in info["menu_categories"]} == {"Overlay", "Measure"}
     required_inputs = AngleMeasure.INPUT_TYPES()["required"]
     optional_inputs = AngleMeasure.INPUT_TYPES().get("optional", {})
     assert required_inputs["color"][1]["default"] == "#ff9800"