diff --git a/index.html b/index.html
index 2bbfa4e..a7cfa73 100644
--- a/index.html
+++ b/index.html
@@ -37,6 +37,7 @@
     <button data-alt="i" data-button="planner:zoom:+">Zoom in</button>
     <button data-alt="o" data-button="planner:zoom:-">Zoom out</button>
     <button data-alt="c" data-toggle="planner:toggle-casing" data-toggled="false">Show casing</button>
+    <button data-alt="r" data-toggle="planner:toggle-block-recipe-overlay" data-toggled="true">Show block recipes</button>
     <button data-alt="c" data-button="dialogs:welcome">Show welcome</button>
   </div>
 </nav>
@@ -90,7 +91,7 @@
       <template>
         <div class="grid m2">
           <template>
-            <div></div>
+            <div class="planner--cell"></div>
           </template>
         </div>
       </template>
@@ -125,7 +126,7 @@
   </section>
 </aside>
 <footer>
-  <div>pre-alpha 1.4</div>
+  <div>pre-alpha 1.5</div>
   <div>
     <a href="https://discord.gg/Eq72HwPqfg">Discord server</a>
   </div>
diff --git a/scripts/atlas.js b/scripts/atlas.js
index 1e4cfa5..faf1a4d 100644
--- a/scripts/atlas.js
+++ b/scripts/atlas.js
@@ -1,6 +1,7 @@
 import { emitEvent } from "./events.js";
 import { checkEquivalence } from "./ncpf-utils.js";
 import { registerLoadCallback } from "./main.js";
+import { getPlannerMultiblockType } from "./planner.js";
 
 const defaultSize = 16; // px
 
@@ -192,7 +193,10 @@ export function getAtlasMetadata(index) {
   return null;
 }
 
-export function getAtlasIndexFromMetadata(metadata, configuration, configurationList = null) {
+export function getAtlasIndexFromMetadata(metadata, configuration = null, configurationList = null) {
+  if (!configuration) {
+    configuration = getPlannerMultiblockType();
+  }
   let index = 0;
   for (const atlas of atlases) {
     for (const atlasItemMeta of atlas.metadata) {
diff --git a/scripts/dom-list.js b/scripts/dom-list.js
index fff930b..1260d68 100644
--- a/scripts/dom-list.js
+++ b/scripts/dom-list.js
@@ -1,5 +1,5 @@
 import { deleteTooltip } from "./tooltip.js";
-import { deleteSolverMetadata } from "./metadata.js";
+import { deleteMetadata } from "./metadata.js";
 
 export class DomList {
   list;
@@ -15,7 +15,7 @@ export class DomList {
     this.list.querySelectorAll("[data-tooltip]")
         .forEach(e => deleteTooltip(Number(e.dataset.tooltip)));
     this.list.querySelectorAll("[data-solver-metadata]")
-        .forEach(e => deleteSolverMetadata(Number(e.dataset.solverMetadata)));
+        .forEach(e => deleteMetadata(Number(e.dataset.solverMetadata)));
     this.list.replaceChildren(...this.list.querySelectorAll(":scope > template, :scope > [data-keep]"));
   }
 
diff --git a/scripts/files.js b/scripts/files.js
index 3997ce0..3cb2ca9 100644
--- a/scripts/files.js
+++ b/scripts/files.js
@@ -12,7 +12,7 @@ import { getAtlasIndexFromMetadata, getAtlasMetadata } from "./atlas.js";
 import { resetSolver } from "./solver.js";
 import { registerLoadCallback } from "./main.js";
 import { DevError, UserError } from "./errors.js";
-import { getSolverMetadata } from "./metadata.js";
+import { getMetadata } from "./metadata.js";
 
 registerLoadCallback(() => {
   listenTo("file:load", () => showOpenFileDialog(({ data, filename }) => loadFile(data, filename)));
@@ -132,7 +132,7 @@ export async function saveFile(name = undefined) {
                 if (!fullBlock || !fullBlock.modules || !("ncpf:block_recipes" in fullBlock.modules)) return;
 
                 const designIndex = designBlocksAtlasMap[Number(designAsCellData[x][y][z].tile)].designIndex;
-                const solverMetadata = getSolverMetadata(designAsCellData[x][y][z].solverMetadata);
+                const solverMetadata = getMetadata(designAsCellData[x][y][z].solverMetadata);
                 const minimizedBlock = minimizedBlocks[designIndex];
                 let recipeIndex = -1;
 
@@ -169,7 +169,7 @@ export async function saveFile(name = undefined) {
   if (multiblockType === "nuclearcraft:overhaul_sfr") {
     const coolantRecipes = [];
     let coolantRecipeIndex;
-    const plannerMetadata = getSolverMetadata(getPlannerDom());
+    const plannerMetadata = getMetadata(getPlannerDom());
 
     coolantRecipes.push(stripEntryToMinimums(plannerMetadata.coolant_recipe));
     coolantRecipeIndex = 0;
diff --git a/scripts/main.js b/scripts/main.js
index fd90a29..e5b23da 100644
--- a/scripts/main.js
+++ b/scripts/main.js
@@ -12,6 +12,7 @@ import "./js-utils.js"
 import "./menu-bar.js";
 import "./metadata.js";
 import "./ncpf-utils.js";
+import "./overlays.js";
 import "./planner.js";
 import "./planner-resize.js";
 import "./recipe-selector.js";
diff --git a/scripts/metadata.js b/scripts/metadata.js
index fa967fd..8772551 100644
--- a/scripts/metadata.js
+++ b/scripts/metadata.js
@@ -1,38 +1,58 @@
+import { clearCellOverlays, processCellOverlays } from "./overlays.js";
 
-const solverMetadata = {};
-let solverMetadataCounter = 0;
-function createSolverMetadata(data) {
-  const id = solverMetadataCounter;
-  solverMetadata[id] = data;
-  solverMetadataCounter++;
+const metadata = {};
+let metadataCounter = 0;
+function createMetadata(data) {
+  const id = metadataCounter;
+  metadata[id] = data;
+  metadataCounter++;
   return id;
 }
-export function setSolverMetadata(domNode, data) {
+export function setDomMetadata(domNode, data) {
   if (domNode.dataset.solverMetadata) {
-    solverMetadata[Number(domNode.dataset.solverMetadata)] = data;
+    metadata[Number(domNode.dataset.solverMetadata)] = data;
     return;
   }
-  domNode.dataset.solverMetadata = createSolverMetadata(data).toString(10);
+  domNode.dataset.solverMetadata = createMetadata(data).toString(10);
 }
-export function getSolverMetadata(id) {
+export function setCellMetadata(node, key, value) {
+  if (!node.dataset.solverMetadata) {
+    node.dataset.solverMetadata = createMetadata({ [key]: value }).toString(10);
+  } else {
+    metadata[Number(node.dataset.solverMetadata)][key] = value;
+  }
+  processCellOverlays(node, key, true);
+}
+
+export function getMetadata(id) {
   if (typeof id === "object") {
     // assume DOM element
     if (id.dataset && id.dataset.solverMetadata) {
-      return getSolverMetadata(id.dataset.solverMetadata);
+      return getMetadata(id.dataset.solverMetadata);
     }
     return null;
   }
   if (typeof id === "string") {
-    return getSolverMetadata(Number(id));
+    return getMetadata(Number(id));
   }
-  return solverMetadata[id];
+  return metadata[id];
 }
-export function deleteSolverMetadata(id) {
+export function getCellMetadata(node, key) {
+  return metadata[Number(node.dataset.solverMetadata)][key];
+}
+
+export function deleteMetadata(id) {
   if (typeof id === "object") {
     // assume DOM object
     if (id.dataset && id.dataset.solverMetadata) {
-      return deleteSolverMetadata(id.dataset.solverMetadata);
+      clearCellOverlays(id);
+      return deleteMetadata(id.dataset.solverMetadata);
     }
   }
-  delete solverMetadata[id];
+  delete metadata[id];
+}
+export function clearCellMetadata(node, key) {
+  if (!node.dataset.solverMetadata) return;
+  delete metadata[Number(node.dataset.solverMetadata)][key];
+  processCellOverlays(node, key, false);
 }
diff --git a/scripts/overlays.js b/scripts/overlays.js
new file mode 100644
index 0000000..b7cb80e
--- /dev/null
+++ b/scripts/overlays.js
@@ -0,0 +1,21 @@
+import { getCellMetadata } from "./metadata.js";
+import { getAtlasIndexFromMetadata, makeAtlasImage } from "./atlas.js";
+
+export function processCellOverlays(node, key = null, added = null) {
+  if (key) {
+    const metadata = getCellMetadata(node, key);
+    const atlasIndex = getAtlasIndexFromMetadata(metadata);
+    if (atlasIndex && atlasIndex !== -1) {
+      const overlayNode = makeAtlasImage(atlasIndex);
+      overlayNode.dataset.overlay = key;
+      overlayNode.classList.add("planner--overlay");
+      node.appendChild(overlayNode);
+    }
+    // FIXME: handle remove
+  }
+  // TODO: handle generic update
+}
+
+export function clearCellOverlays(node) {
+  // TODO
+}
diff --git a/scripts/planner-resize.js b/scripts/planner-resize.js
index a4d28d7..7d069de 100644
--- a/scripts/planner-resize.js
+++ b/scripts/planner-resize.js
@@ -5,7 +5,7 @@ import {
   createPlannerPlane,
   getPlannerDom,
   getPlannerMultiblockSize, getPlannerMultiblockType,
-  maxMultiblockSize
+  maxMultiblockSize, minMultiblockSize
 } from "./planner.js";
 import { DomList } from "./dom-list.js";
 
@@ -133,20 +133,20 @@ function initializeResize() {
       newDiv.dataset.casing = "";
     }
 
-    if (!casing && size[1] > maxMultiblockSize[type][1]) {
+    if (!casing && size[1] > minMultiblockSize[type][1]) {
       newDiv.appendChild(createButton({ axis: "y", add: false, n: gridIndex }));
     }
     if (!casing) {
       for (let x = 0; x < size[0] - 1 && size[0] < maxMultiblockSize[type][0]; x++) {
         newDiv.appendChild(createButton({ axis: "x", add: true, n: x+1, topLeft: true }));
       }
-      for (let x = 0; x < size[0] - 2 && size[0] > maxMultiblockSize[type][0]; x++) {
+      for (let x = 0; x < size[0] - 2 && size[0] > minMultiblockSize[type][0]; x++) {
         newDiv.appendChild(createButton({ axis: "x", add: false, n: x+1, topLeft: true }));
       }
       for (let z = 0; z < size[2] - 1 && size[2] < maxMultiblockSize[type][2]; z++) {
         newDiv.appendChild(createButton({ axis: "z", add: true, n: z+1, topLeft: true }));
       }
-      for (let z = 0; z < size[2] - 2 && size[2] > maxMultiblockSize[type][2]; z++) {
+      for (let z = 0; z < size[2] - 2 && size[2] > minMultiblockSize[type][2]; z++) {
         newDiv.appendChild(createButton({ axis: "z", add: false, n: z+1, topLeft: true }));
       }
     }
@@ -158,13 +158,13 @@ function initializeResize() {
       for (let x = 0; x < size[0] - 1 && size[0] < maxMultiblockSize[type][0]; x++) {
         newDiv.appendChild(createButton({ axis: "x", add: true, n: x+1, topLeft: false }));
       }
-      for (let x = 0; x < size[0] - 2 && size[0] > maxMultiblockSize[type][0]; x++) {
+      for (let x = 0; x < size[0] - 2 && size[0] > minMultiblockSize[type][0]; x++) {
         newDiv.appendChild(createButton({ axis: "x", add: false, n: x+1, topLeft: false }));
       }
       for (let z = 0; z < size[2] - 1 && size[2] < maxMultiblockSize[type][2]; z++) {
         newDiv.appendChild(createButton({ axis: "z", add: true, n: z+1, topLeft: false }));
       }
-      for (let z = 0; z < size[2] - 2 && size[2] > maxMultiblockSize[type][2]; z++) {
+      for (let z = 0; z < size[2] - 2 && size[2] > minMultiblockSize[type][2]; z++) {
         newDiv.appendChild(createButton({ axis: "z", add: false, n: z+1, topLeft: false }));
       }
     }
@@ -186,13 +186,14 @@ function fixPlannerNumbering() {
   const planner = getPlannerDom();
   const size = getPlannerMultiblockSize();
   const grids = planner.querySelectorAll(":scope > .planner--resize > .grid");
-  grids.forEach(grid => {
+  grids.forEach((grid, y) => {
     grid.style.setProperty("--width", size[0].toString(10));
     const tiles = [...grid.querySelectorAll("[data-tile]")];
     for (let z = 0; z < size[2]; z++) {
       for (let x = 0; x < size[0]; x++) {
         const tile = tiles.shift();
         tile.dataset.x = x.toString(10);
+        tile.dataset.y = y.toString(10);
         tile.dataset.z = z.toString(10);
       }
     }
diff --git a/scripts/planner.js b/scripts/planner.js
index ef819bf..c585399 100644
--- a/scripts/planner.js
+++ b/scripts/planner.js
@@ -6,7 +6,7 @@ import { initialize3dArray } from "./js-utils.js";
 import { recall, save } from "./storage.js";
 import { registerLoadCallback } from "./main.js";
 import { getBlockPickerActiveItem, getBlockPickerRecipe } from "./block-picker.js";
-import { deleteSolverMetadata, getSolverMetadata, setSolverMetadata } from "./metadata.js";
+import { clearCellMetadata, getMetadata, setCellMetadata } from "./metadata.js";
 import { retainTooltipHover } from "./tooltip.js";
 import { checkEquivalence, lookupFromMetadata } from "./ncpf-utils.js";
 
@@ -17,6 +17,9 @@ const zoomStorageKey = "zoom-size";
 const casingStorageKey = "casing";
 const casingDefault = false; // hidden by default
 
+const recipeOverlayStorageKey = "recipeOverlay";
+const recipeOverlayDefault = true; // shown by default
+
 const defaultMultiblockSize = [9, 7, 9]; // width (screen x), height (xy grids), depth (screen y)
 const defaultMultiblockType = "nuclearcraft:overhaul_sfr";
 export const maxMultiblockSize = {
@@ -42,6 +45,15 @@ registerLoadCallback(() => {
     document.body.dataset.casing = e.detail.state ? "show" : "hide";
   });
 
+  const recipeOverlayShow = recall(recipeOverlayStorageKey, recipeOverlayDefault);
+  document.body.dataset.recipeOverlay = recipeOverlayShow ? "show" : "hide";
+  getElements("toggle", "planner:toggle-block-recipe-overlay")
+      .forEach(e => e.dataset.toggled = recipeOverlayShow.toString());
+  listenTo("planner:toggle-block-recipe-overlay", e => {
+    save(recipeOverlayStorageKey, e.detail.state);
+    document.body.dataset.recipeOverlay = e.detail.state ? "show" : "hide";
+  });
+
   const zoomLevel = recall(zoomStorageKey, zoomDefault);
   document.getElementById("planner").style
       .setProperty("--scale-factor", zoomLevel);
@@ -238,7 +250,7 @@ function cellClickEvent(e) {
     if (e.target.tile === "-1") return;
 
     e.target.dataset.previewRemove = "yes";
-    deleteSolverMetadata(e.target);
+    clearCellMetadata(e.target, "block_recipe");
   } else if (e.buttons === 1) {
     // add
     if (e.target.dataset.preview === activeItem.toString(10)) return;
@@ -247,7 +259,7 @@ function cellClickEvent(e) {
     e.target.replaceChildren(makeAtlasImage(activeItem));
     const pickerRecipe = getBlockPickerRecipe();
     if (pickerRecipe) {
-      setSolverMetadata(e.target, { block_recipe: pickerRecipe });
+      setCellMetadata(e.target, "block_recipe", pickerRecipe);
     }
   }
 }
@@ -327,7 +339,7 @@ export function* getCellTooltip(cell) {
   }
   const metadata = getAtlasMetadata(cell.dataset.tile)
   const data = lookupFromMetadata(metadata);
-  const solverMetadata = getSolverMetadata(cell);
+  const solverMetadata = getMetadata(cell);
 
   yield data.modules["plannerator:display_name"].display_name;
 
diff --git a/scripts/recipe-selector.js b/scripts/recipe-selector.js
index b4f0fbc..e197ed4 100644
--- a/scripts/recipe-selector.js
+++ b/scripts/recipe-selector.js
@@ -4,7 +4,7 @@ import { configuration } from "./configuration.js";
 import { getPlannerDom, getPlannerMultiblockType, getSelectedCells } from "./planner.js";
 import { DomList } from "./dom-list.js";
 import { getAtlasIndexFromMetadata, getAtlasMetadata, makeAtlasImage } from "./atlas.js";
-import { deleteSolverMetadata, getSolverMetadata, setSolverMetadata } from "./metadata.js";
+import { clearCellMetadata, getMetadata, setCellMetadata, setDomMetadata } from "./metadata.js";
 import {
   checkEquivalence,
   findFullEntry,
@@ -154,11 +154,11 @@ function rescanDesignRecipes() {
     const designItem = designRecipes.makeItem();
 
     const plannerDom = getPlannerDom();
-    const plannerMetadata = getSolverMetadata(plannerDom);
+    const plannerMetadata = getMetadata(plannerDom);
     let currentSelection = plannerMetadata?.coolant_recipe;
     if (!plannerMetadata) {
       currentSelection = defaultRecipes[multiblockType].coolant_recipe;
-      setSolverMetadata(plannerDom, {
+      setDomMetadata(plannerDom, {
         coolant_recipe: currentSelection,
       });
     }
@@ -169,7 +169,7 @@ function rescanDesignRecipes() {
       title: "Coolant Recipe",
       entryListType: "coolant_recipes",
       recipes: coolantRecipes,
-      updateSelection: r => setSolverMetadata(plannerDom, { coolant_recipe: r }),
+      updateSelection: r => setDomMetadata(plannerDom, { coolant_recipe: r }),
       multiblockType,
       currentSelection,
     });
@@ -204,7 +204,7 @@ function rescanSelectionRecipes() {
     return;
   }
 
-  const cellRecipes = selectedCells.map(v => getSolverMetadata(v)?.block_recipe);
+  const cellRecipes = selectedCells.map(v => getMetadata(v)?.block_recipe);
   const recipeSet = cellRecipes.some(v => v);
   const recipeAllSame = cellRecipes.every(v => v === cellRecipes[0] || checkEquivalence(v, cellRecipes[0]));
   console.log(">", cellRecipes, recipeSet, recipeAllSame);
@@ -238,11 +238,11 @@ function rescanSelectionRecipes() {
     multiblockType,
     updateSelection: (e) => {
       if (e === recipes[0]) {
-        selectedCells.forEach(v => deleteSolverMetadata(v));
+        selectedCells.forEach(v => clearCellMetadata(v, "block_recipe"));
         return;
       }
       const stripped = stripEntryToMinimums(e);
-      selectedCells.forEach(v => setSolverMetadata(v, { block_recipe: stripped }));
+      selectedCells.forEach(v => setCellMetadata(v, "block_recipe", stripped));
       if (pickerTile !== -1) {
         setBlockPickerRecipe(e);
       }
diff --git a/scripts/solver.js b/scripts/solver.js
index 93eedca..4eeffe5 100644
--- a/scripts/solver.js
+++ b/scripts/solver.js
@@ -1,7 +1,7 @@
 import { emitEvent } from "./events.js";
 import { getPlannerCellDom, getPlannerDom } from "./planner.js";
 import { findFullEntry } from "./ncpf-utils.js";
-import { setSolverMetadata } from "./metadata.js";
+import { setCellMetadata, setDomMetadata } from "./metadata.js";
 
 export function resetSolver(design = undefined, designConfiguration) {
   const planner = getPlannerDom();
@@ -15,7 +15,7 @@ export function resetSolver(design = undefined, designConfiguration) {
           designCoolantRecipe,
           { configurationHint: design.type },
       );
-      setSolverMetadata(planner, { coolant_recipe: fullCoolantRecipe });
+      setDomMetadata(planner, { coolant_recipe: fullCoolantRecipe });
 
       const designBlockRecipes = design.block_recipes.flat(3);
       for (let x = 0; x < design.dimensions[0]; x++) {
@@ -25,7 +25,7 @@ export function resetSolver(design = undefined, designConfiguration) {
             if (!block || !block.modules || !block.modules["ncpf:block_recipes"]) continue;
             const blockRecipeIndex = designBlockRecipes.shift();
             const blockRecipe = block.modules["ncpf:block_recipes"].recipes[blockRecipeIndex];
-            setSolverMetadata(getPlannerCellDom(x, y, z), { block_recipe: blockRecipe });
+            setCellMetadata(getPlannerCellDom(x, y, z), "block_recipe", blockRecipe);
           }
         }
       }
diff --git a/style.css b/style.css
index 6c9cb94..1f11099 100644
--- a/style.css
+++ b/style.css
@@ -240,12 +240,18 @@ input:not([type="checkbox"]):not([type="radio"]):not([type="file"]) {
             calc(var(--scale-factor) * var(--size-x, var(--default-size)) * 0.4);
     background-color: var(--highlight-color, #f808);
 }
+
 [data-casing="hide"] #planner .grid {
     --width-override: calc(var(--width) - 2);
 }
 [data-casing="hide"] [data-casing] {
     display: none;
 }
+
+[data-recipe-overlay="hide"] .planner--overlay[data-overlay="block_recipe"] {
+    display: none;
+}
+
 [data-selected] {
     outline: calc(var(--scale-factor) * 1px) dashed var(--cell-selected-outline, #f80);
     outline-offset: calc(var(--scale-factor) * -1px);
@@ -254,6 +260,15 @@ input:not([type="checkbox"]):not([type="radio"]):not([type="file"]) {
     outline: none;
 }
 
+.planner--cell {
+    position: relative;
+}
+.planner--cell > .planner--overlay {
+    position: absolute;
+    inset: 0;
+    opacity: var(--overlay-opacity, 0.8);
+}
+
 .planner--resize {
     --resize-width: var(--width);
     --resize-height: var(--height);