diff --git a/src/include/pw3270.h b/src/include/pw3270.h
index 3e4e37c..9507141 100644
--- a/src/include/pw3270.h
+++ b/src/include/pw3270.h
@@ -54,6 +54,14 @@
 
 	void pw3270_load_placeholders(GtkBuilder * builder);
 
+	// Application settings widget
+	typedef struct _Pw3270SettingWidget Pw3270SettingsWidget;
+
+	struct _Pw3270SettingWidget {
+		GtkWidget * widget;
+		void (*apply)(Pw3270SettingsWidget *, GtkApplication *, GSettings *);
+		void (*revert)(Pw3270SettingsWidget *, GtkApplication *, GSettings *);
+	};
 
 	G_END_DECLS
 
diff --git a/src/objects/application/actions/preferences.c b/src/objects/application/actions/preferences.c
index 812635f..5ddc0f1 100644
--- a/src/objects/application/actions/preferences.c
+++ b/src/objects/application/actions/preferences.c
@@ -28,11 +28,120 @@
  */
 
  #include "../private.h"
+ #include <pw3270.h>
  #include <pw3270/application.h>
 
- void pw3270_application_preferences_activated(GSimpleAction G_GNUC_UNUSED(* action), GVariant G_GNUC_UNUSED(*parameter), gpointer application) {
+ typedef struct _Pw3270SettingsDialog {
+ 	GtkApplication	* application;
+ 	GSimpleAction	* action;
+ 	GSList			* pages;
+ } Pw3270SettingsDialog;
+
+ static void on_destroy(GtkWidget *dialog, Pw3270SettingsDialog *settings) {
+	g_slist_free_full(settings->pages,g_free);
+	g_free(settings);
+	g_simple_action_set_enabled(settings->action,TRUE);
+ }
+
+ void on_response(GtkDialog *dialog, gint response_id, Pw3270SettingsDialog * settings) {
+
+	GSList * page;
+	GSettings *hSettings = pw3270_application_get_settings(settings->application);
+
+	switch(response_id) {
+	case GTK_RESPONSE_CANCEL:
+		g_message("Reverting application settings");
+		for(page = settings->pages;page;page = page->next) {
+			Pw3270SettingsWidget * widget = (Pw3270SettingsWidget *) page->data;
+			widget->revert(widget,settings->application,hSettings);
+		}
+		break;
+
+	case GTK_RESPONSE_APPLY:
+		g_message("Aplying application settings");
+		for(page = settings->pages;page;page = page->next) {
+			Pw3270SettingsWidget * widget = (Pw3270SettingsWidget *) page->data;
+			widget->apply(widget,settings->application,hSettings);
+		}
+		break;
+	}
+
+	gtk_widget_destroy(dialog);
+ }
+
+ static void on_page_added(GtkNotebook *notebook, GtkWidget *widget, guint page_num, Pw3270SettingsDialog * settings) {
+
+	// https://developer.gnome.org/hig/stable/visual-layout.html.en
+
+	if(GTK_IS_GRID(widget)) {
+		gtk_grid_set_row_spacing(GTK_GRID(widget),6);
+		gtk_grid_set_column_spacing(GTK_GRID(widget),12);
+	}
+
+	if(GTK_IS_CONTAINER(widget)) {
+		gtk_container_set_border_width(GTK_CONTAINER(widget),18);
+	}
+
+ }
+
+ void pw3270_application_preferences_activated(GSimpleAction *action, GVariant G_GNUC_UNUSED(*parameter), gpointer application) {
 
 	debug("%s",__FUNCTION__);
 
+	// Create dialog.
+	gboolean use_header;
+	g_object_get(gtk_settings_get_default(), "gtk-dialogs-use-header", &use_header, NULL);
+
+	GtkWidget * dialog =
+		GTK_WIDGET(g_object_new(
+			GTK_TYPE_DIALOG,
+			"use-header-bar", (use_header ? 1 : 0),
+			NULL
+		));
+
+	gtk_window_set_title(GTK_WINDOW(dialog),_("Application preferences"));
+	gtk_window_set_deletable(GTK_WINDOW(dialog),FALSE);
+    gtk_window_set_destroy_with_parent(GTK_WINDOW(dialog), TRUE);
+
+    gtk_window_set_transient_for(GTK_WINDOW(dialog),gtk_application_get_active_window(GTK_APPLICATION(application)));
+    gtk_window_set_destroy_with_parent(GTK_WINDOW(dialog),TRUE);
+
+	gtk_dialog_add_buttons(
+		GTK_DIALOG(dialog),
+		_("_Cancel"), GTK_RESPONSE_CANCEL,
+		_("_Apply"), GTK_RESPONSE_APPLY,
+		NULL
+	);
+
+	// Create setttings data.
+	Pw3270SettingsDialog * settings = g_new0(Pw3270SettingsDialog,1);
+	settings->action		= action;
+	settings->application	= GTK_APPLICATION(application);
+
+	g_simple_action_set_enabled(action,FALSE);
+	gtk_window_set_deletable(GTK_WINDOW(dialog),FALSE);
+
+	// Create settings notebook.
+
+	GtkNotebook *notebook = GTK_NOTEBOOK(gtk_notebook_new());
+
+	gtk_notebook_set_scrollable(notebook,TRUE);
+	gtk_notebook_set_show_tabs(notebook,TRUE);
+	gtk_notebook_set_show_border(notebook, FALSE);
+
+	g_signal_connect(G_OBJECT(notebook), "page-added", G_CALLBACK(on_page_added), dialog);
+//	g_signal_connect(G_OBJECT(notebook), "page-removed", G_CALLBACK(on_page_changed), dialog);
+//	g_signal_connect(G_OBJECT(notebook), "switch-page", G_CALLBACK(on_switch_page), dialog);
+	gtk_box_pack_start(GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))),GTK_WIDGET(notebook),TRUE,TRUE,0);
+
+	// Connection signals.
+	g_signal_connect(dialog,"destroy",G_CALLBACK(on_destroy),settings);
+	g_signal_connect(dialog,"response",G_CALLBACK(on_response),settings);
+	g_signal_connect(dialog,"close",G_CALLBACK(gtk_widget_destroy),NULL);
+
+	// Show dialog.
+	gtk_widget_show_all(dialog);
+	gtk_window_set_deletable(GTK_WINDOW(dialog),FALSE);
+
  }
 
diff --git a/ui/application.xml b/ui/application.xml
index 4d67f32..d02839b 100644
--- a/ui/application.xml
+++ b/ui/application.xml
@@ -64,7 +64,7 @@
 
 		<item>
 			<attribute name="label" translatable="yes">Preferences</attribute>
-			<attribute name="action">win.preferences</attribute>
+			<attribute name="action">app.preferences</attribute>
 		</item>
 
 		<item>
diff --git a/ui/window.xml b/ui/window.xml
index b1563c4..151a0f6 100644
--- a/ui/window.xml
+++ b/ui/window.xml
@@ -50,7 +50,7 @@
 
 		<item>
 			<attribute name="label" translatable="yes">Preferences</attribute>
-			<attribute name="action">win.preferences</attribute>
+			<attribute name="action">app.preferences</attribute>
 		</item>
 
 	</menu>
--
libgit2 0.21.2