diff --git a/data/icons/hicolor/scalable/actions/io.github.gnacho.Scribe-typewriter-symbolic.svg b/data/icons/hicolor/scalable/actions/io.github.gnacho.Scribe-typewriter-symbolic.svg
new file mode 100644
index 0000000..6165ebf
--- /dev/null
+++ b/data/icons/hicolor/scalable/actions/io.github.gnacho.Scribe-typewriter-symbolic.svg
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <g fill="#2e3436">
+    <path d="M5.5 1h5a1 1 0 0 1 1 1v2h-7V2a1 1 0 0 1 1-1z"/>
+    <rect x="3" y="3" width="10" height="2.2" rx="1.1"/>
+    <path fill-rule="evenodd" d="M3.2 6h9.6a1.2 1.2 0 0 1 1.2 1.2v5.6a1.2 1.2 0 0 1-1.2 1.2H3.2A1.2 1.2 0 0 1 2 12.8V7.2A1.2 1.2 0 0 1 3.2 6zm.8 1.3v2h2.2v-2zm3.4 0v2h2.2v-2zm3.4 0v2h2.2v-2zM4 9.8v2h2.2v-2zm3.4 0v2h2.2v-2zm3.4 0v2h2.2v-2zM4.6 12.2h6.8v1H4.6z"/>
+  </g>
+</svg>
diff --git a/data/icons/icons.gresource.xml b/data/icons/icons.gresource.xml
index 0788c0b..9efef08 100644
--- a/data/icons/icons.gresource.xml
+++ b/data/icons/icons.gresource.xml
@@ -18,6 +18,7 @@
     <file alias="io.github.gnacho.Scribe-symbolic.svg">hicolor/symbolic/apps/io.github.gnacho.Scribe-symbolic.svg</file>
     <file alias="io.github.gnacho.Scribe-preview-off-symbolic.svg">hicolor/scalable/actions/io.github.gnacho.Scribe-preview-off-symbolic.svg</file>
     <file alias="io.github.gnacho.Scribe-preview-on-symbolic.svg">hicolor/scalable/actions/io.github.gnacho.Scribe-preview-on-symbolic.svg</file>
+    <file alias="io.github.gnacho.Scribe-typewriter-symbolic.svg">hicolor/scalable/actions/io.github.gnacho.Scribe-typewriter-symbolic.svg</file>
     <file alias="document-edit-symbolic.svg">hicolor/scalable/actions/document-edit-symbolic.svg</file>
     <file alias="tab-new-symbolic.svg">hicolor/scalable/actions/tab-new-symbolic.svg</file>
     <file alias="preferences-desktop-appearance-symbolic.svg">hicolor/scalable/actions/preferences-desktop-appearance-symbolic.svg</file>
diff --git a/src/window.rs b/src/window.rs
index f90c8e9..b2ccaa1 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -801,14 +801,15 @@ impl ScribeWindow {
             .build();
         header.pack_end(&search_button);
 
-        // Botón de vista dividida (issue #35), como el de Typesetter: el icono
-        // dice qué se va a ver y comparte estado con la acción (Ctrl+Shift+P).
-        let preview_button = gtk4::ToggleButton::builder()
-            .icon_name("io.github.gnacho.Scribe-preview-off-symbolic")
-            .tooltip_text(gettext("Split View"))
-            .action_name("win.toggle-preview")
+        // Modo máquina de escribir (issue #151): comparte estado con la acción
+        // y su atajo (Ctrl+Shift+T). La vista dividida sigue disponible desde
+        // el teclado (Ctrl+Shift+P).
+        let typewriter_button = gtk4::ToggleButton::builder()
+            .icon_name("io.github.gnacho.Scribe-typewriter-symbolic")
+            .tooltip_text(gettext("Typewriter Mode (Ctrl+Shift+T)"))
+            .action_name("win.typewriter-mode")
             .build();
-        header.pack_end(&preview_button);
+        header.pack_end(&typewriter_button);
 
         // ---- menú principal ----
         let menu = gio::Menu::new();
@@ -1979,27 +1980,6 @@ impl ScribeWindow {
                 settings.set_show_preview(next);
             });
         }
-        // El icono del botón dice qué se va a ver: panel derecho atenuado
-        // (previsualización oculta) o relleno (visible).
-        {
-            let preview_button = preview_button.clone();
-            let sync_icon = move |on: bool| {
-                preview_button.set_icon_name(if on {
-                    "io.github.gnacho.Scribe-preview-on-symbolic"
-                } else {
-                    "io.github.gnacho.Scribe-preview-off-symbolic"
-                });
-            };
-            sync_icon(preview_visible.get());
-            action_preview.connect_state_notify(move |action| {
-                sync_icon(
-                    action
-                        .state()
-                        .and_then(|s| s.get::<bool>())
-                        .unwrap_or(false),
-                );
-            });
-        }
 
         // ---- estilos (issue #36) ----
         {