diff --git a/slides.md b/slides.md
index 3fdb960..623c1e8 100644
--- a/slides.md
+++ b/slides.md
@@ -2,7 +2,8 @@
 marp: true
 title: Una mirada funciona a Java 21
 theme: gaia
-footer: #Commitconf 2024
+footer: #commitconf 2024
+author: Antonio Muñoz
 color: #fff
 transition: fade-out
 backgroundImage: url('https://cdn.wallpapersafari.com/97/99/MnWulT.jpg')
@@ -142,7 +143,7 @@
 public sealed interface Tree {
     record Node(String value, Tree left, Tree right) implements Tree { }
     record Leaf(String value) implements Tree {}
-} 
+}
 ```
 
 ---
@@ -155,7 +156,7 @@
 public sealed interface Optional<T> {
     record Empty<T>() implements Optional<T> { }
     record Present<T>(T value) implements Optional<T> {}
-} 
+}
 ```
 
 ---
@@ -236,9 +237,9 @@
 * AKA withers.
 
 ```java
-Point newPoint = oldPoint with { 
-    x *= 2; 
-    y *= 2; 
+Point newPoint = oldPoint with {
+    x *= 2;
+    y *= 2;
 };
 ```
 
@@ -251,6 +252,13 @@
 * Mejora para pattern matching.
 * Cualquier clase.
 
+```java
+var result = switch (optional) {
+    case Optional.of(var value) -> value.toString();
+    case Optional.empty() -> "empty";
+};
+```
+
 ---
 
 # ¿Qué falta todavía?