diff --git a/frontend/app.js b/frontend/app.js
index ec378a3..09093a4 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -1,6 +1,7 @@
 const GRID = 20;
 const SNAPSHOTS_KEY = "schemeta:snapshots:v2";
 const SCHEMA_URL = "/schemeta.schema.json";
+const INSPECTOR_SECTIONS_KEY = "schemeta:inspector-sections:v1";
 const NET_CLASSES = ["power", "ground", "signal", "analog", "differential", "clock", "bus"];
 const PIN_SIDES = ["left", "right", "top", "bottom"];
 const PIN_TYPES = ["power_in", "power_out", "input", "output", "bidirectional", "passive", "analog", "ground"];
@@ -53,9 +54,13 @@ const el = {
   compileStatus: document.getElementById("compileStatus"),
   selectedSummary: document.getElementById("selectedSummary"),
   componentEditor: document.getElementById("componentEditor"),
+  componentSection: document.getElementById("componentSection"),
   symbolEditor: document.getElementById("symbolEditor"),
+  symbolSection: document.getElementById("symbolSection"),
   pinEditor: document.getElementById("pinEditor"),
+  pinSection: document.getElementById("pinSection"),
   netEditor: document.getElementById("netEditor"),
+  netSection: document.getElementById("netSection"),
   instRefInput: document.getElementById("instRefInput"),
   instValueInput: document.getElementById("instValueInput"),
   instNotesInput: document.getElementById("instNotesInput"),
@@ -1653,6 +1658,33 @@ function sortKeysDeep(value) {
   return value;
 }
 
+function saveInspectorSectionState() {
+  const stateObj = {
+    component: Boolean(el.componentSection?.open),
+    symbol: Boolean(el.symbolSection?.open),
+    pin: Boolean(el.pinSection?.open),
+    net: Boolean(el.netSection?.open)
+  };
+  localStorage.setItem(INSPECTOR_SECTIONS_KEY, JSON.stringify(stateObj));
+}
+
+function loadInspectorSectionState() {
+  try {
+    const raw = localStorage.getItem(INSPECTOR_SECTIONS_KEY);
+    if (!raw) {
+      return;
+    }
+    const parsed = JSON.parse(raw);
+    if (typeof parsed !== "object" || !parsed) {
+      return;
+    }
+    if (el.componentSection) el.componentSection.open = parsed.component !== false;
+    if (el.symbolSection) el.symbolSection.open = parsed.symbol !== false;
+    if (el.pinSection) el.pinSection.open = parsed.pin !== false;
+    if (el.netSection) el.netSection.open = parsed.net !== false;
+  } catch {}
+}
+
 async function loadSchemaText() {
   if (state.schemaText) {
     return state.schemaText;
@@ -1890,6 +1922,12 @@ function setupEvents() {
   });
   el.instanceList.addEventListener("scroll", renderInstances, { passive: true });
   el.netList.addEventListener("scroll", renderNets, { passive: true });
+  [el.componentSection, el.symbolSection, el.pinSection, el.netSection].forEach((section) => {
+    if (!section) {
+      return;
+    }
+    section.addEventListener("toggle", saveInspectorSectionState);
+  });
 
   el.instanceList.addEventListener("click", (evt) => {
     const item = evt.target.closest("[data-ref-item]");
@@ -2869,6 +2907,7 @@ function setupEvents() {
 
 (async function init() {
   setupEvents();
+  loadInspectorSectionState();
   updateTransform();
 
   const snapshots = JSON.parse(localStorage.getItem(SNAPSHOTS_KEY) ?? "[]");
diff --git a/frontend/index.html b/frontend/index.html
index 24134bb..b893709 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -72,7 +72,9 @@
         <section>
           <h2>Selected</h2>
           <div id="selectedSummary" class="card">Click a component, net, or pin to inspect it.</div>
-          <div id="componentEditor" class="editorCard hidden">
+          <details id="componentSection" class="editorSection" open>
+            <summary>Component</summary>
+            <div id="componentEditor" class="editorCard hidden">
             <div class="editorGrid">
               <label>Ref <input id="instRefInput" type="text" /></label>
               <label>Value <input id="instValueInput" type="text" /></label>
@@ -96,8 +98,11 @@
               <button id="deleteComponentBtn">Delete</button>
               <button id="isolateSelectedComponentBtn">Isolate</button>
             </div>
-          </div>
-          <div id="symbolEditor" class="editorCard hidden">
+            </div>
+          </details>
+          <details id="symbolSection" class="editorSection" open>
+            <summary>Symbol</summary>
+            <div id="symbolEditor" class="editorCard hidden">
             <div id="symbolMeta" class="hintText"></div>
             <div class="editorGrid">
               <label>Category <input id="symbolCategoryInput" type="text" /></label>
@@ -110,8 +115,11 @@
             </div>
             <div id="symbolValidation" class="hintText"></div>
             <div id="symbolPinsList" class="miniList"></div>
-          </div>
-          <div id="pinEditor" class="editorCard hidden">
+            </div>
+          </details>
+          <details id="pinSection" class="editorSection" open>
+            <summary>Pin</summary>
+            <div id="pinEditor" class="editorCard hidden">
             <div id="pinMeta" class="hintText"></div>
             <div class="editorGrid">
               <label>Pin Name <input id="pinNameInput" type="text" /></label>
@@ -166,8 +174,11 @@
               <button id="createConnectNetBtn">Create + Connect</button>
             </div>
             <div id="pinConnections" class="miniList"></div>
-          </div>
-          <div id="netEditor" class="editorCard hidden">
+            </div>
+          </details>
+          <details id="netSection" class="editorSection" open>
+            <summary>Net</summary>
+            <div id="netEditor" class="editorCard hidden">
             <div class="editorGrid">
               <label>Name <input id="netNameInput" type="text" /></label>
               <label>Class
@@ -194,7 +205,8 @@
               <button id="addNetNodeBtn">Add Node</button>
             </div>
             <div id="netNodesList" class="miniList"></div>
-          </div>
+            </div>
+          </details>
         </section>
 
         <section>
diff --git a/frontend/styles.css b/frontend/styles.css
index 12aa549..cf5de50 100644
--- a/frontend/styles.css
+++ b/frontend/styles.css
@@ -218,6 +218,31 @@ textarea {
   gap: 8px;
 }
 
+.editorSection {
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  margin-top: 8px;
+  background: #fff;
+}
+
+.editorSection > summary {
+  cursor: pointer;
+  list-style: none;
+  padding: 8px 10px;
+  font-size: 0.8rem;
+  font-weight: 700;
+  color: var(--ink);
+  border-bottom: 1px solid transparent;
+}
+
+.editorSection[open] > summary {
+  border-bottom-color: var(--line);
+}
+
+.editorSection > summary::-webkit-details-marker {
+  display: none;
+}
+
 .editorGrid {
   display: grid;
   grid-template-columns: 1fr 1fr;