diff --git a/k8s/deployment.yaml b/k8s/deployment.yaml
index c2a0b61..f63dfaa 100644
--- a/k8s/deployment.yaml
+++ b/k8s/deployment.yaml
@@ -15,7 +15,7 @@ spec:
     spec:
       containers:
         - name: e440-generator
-          image: git.baumann.gr/adebaumann/e440-generator:1.02
+          image: git.baumann.gr/adebaumann/e440-generator:1.03
           imagePullPolicy: Always
           ports:
             - containerPort: 5000
diff --git a/web/templates/index.html b/web/templates/index.html
index bd0ab26..d780392 100644
--- a/web/templates/index.html
+++ b/web/templates/index.html
@@ -133,6 +133,17 @@
 
     .field input:focus { border-color: var(--accent); }
 
+    .collapse-summary {
+      font-size: 0.75rem;
+      font-weight: 500;
+      color: var(--muted);
+      letter-spacing: 0.025em;
+      cursor: pointer;
+      user-select: none;
+    }
+
+    .collapse-summary:hover { color: var(--ink); }
+
     /* ── Mode toggle ── */
     .mode-toggle {
       display: inline-flex;
@@ -378,36 +389,39 @@ Right</textarea>
             <input name="label_size" type="number" step="any" min="0.5" max="25" value="5.1126" required>
           </div>
         </div>
-        <div class="row row-2" style="margin-top:1.25rem">
-          <div class="field">
-            <label>Major tick length (mm)</label>
-            <input name="major_len" type="number" step="any" min="0.1" max="25" value="4.8" required>
+        <details style="margin-top:1.25rem">
+          <summary class="collapse-summary">Tick length &amp; thickness</summary>
+          <div class="row row-2" style="margin-top:0.9rem">
+            <div class="field">
+              <label>Major tick length (mm)</label>
+              <input name="major_len" type="number" step="0.1" min="0.1" max="25" value="4.8" required>
+            </div>
+            <div class="field">
+              <label>Major tick thickness (mm)</label>
+              <input name="major_w" type="number" step="0.01" min="0.01" max="10" value="0.8" required>
+            </div>
           </div>
-          <div class="field">
-            <label>Major tick thickness (mm)</label>
-            <input name="major_w" type="number" step="any" min="0.01" max="10" value="0.8" required>
+          <div class="row row-2" style="margin-top:1.25rem">
+            <div class="field">
+              <label>Middle tick length (mm)</label>
+              <input name="medium_len" type="number" step="0.1" min="0.1" max="25" value="3.1" required>
+            </div>
+            <div class="field">
+              <label>Middle tick thickness (mm)</label>
+              <input name="medium_w" type="number" step="0.01" min="0.01" max="10" value="0.38" required>
+            </div>
           </div>
-        </div>
-        <div class="row row-2" style="margin-top:1.25rem">
-          <div class="field">
-            <label>Middle tick length (mm)</label>
-            <input name="medium_len" type="number" step="any" min="0.1" max="25" value="3.1" required>
+          <div class="row row-2" style="margin-top:1.25rem">
+            <div class="field">
+              <label>Minor tick length (mm)</label>
+              <input name="small_len" type="number" step="0.1" min="0.1" max="25" value="1.8" required>
+            </div>
+            <div class="field">
+              <label>Minor tick thickness (mm)</label>
+              <input name="small_w" type="number" step="0.01" min="0.01" max="10" value="0.28" required>
+            </div>
           </div>
-          <div class="field">
-            <label>Middle tick thickness (mm)</label>
-            <input name="medium_w" type="number" step="any" min="0.01" max="10" value="0.38" required>
-          </div>
-        </div>
-        <div class="row row-2" style="margin-top:1.25rem">
-          <div class="field">
-            <label>Minor tick length (mm)</label>
-            <input name="small_len" type="number" step="any" min="0.1" max="25" value="1.8" required>
-          </div>
-          <div class="field">
-            <label>Minor tick thickness (mm)</label>
-            <input name="small_w" type="number" step="any" min="0.01" max="10" value="0.28" required>
-          </div>
-        </div>
+        </details>
         <div class="row row-2" style="margin-top:1.25rem">
           <div class="field">
             <label>Font</label>