Add license, and expand variables

22 files changed, 334 insertions, 136 deletions

diff --git a/src/actions.rs b/src/actions.rs
index ee25e20..859d559 100644
--- a/src/actions.rs
+++ b/src/actions.rs
@@ -1,3 +1,19 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 use std::path::PathBuf;
 
 use crate::preferences::UserPreferences;
diff --git a/src/constants.rs b/src/constants.rs
index 1677828..3e7ac12 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,3 +1,19 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 // Zoom configuration
 pub const MIN_ZOOM: f64 = 0.1;
 pub const MAX_ZOOM: f64 = 2.0;
diff --git a/src/dialogs.rs b/src/dialogs.rs
index 6ee7717..f7fb9cf 100644
--- a/src/dialogs.rs
+++ b/src/dialogs.rs
@@ -1,3 +1,19 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 //! Dialog helper functions for file operations and error display.
 
 use std::path::PathBuf;
diff --git a/src/file_registry.rs b/src/file_registry.rs
index 7f062c8..73299f6 100644
--- a/src/file_registry.rs
+++ b/src/file_registry.rs
@@ -1,3 +1,18 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //! Manages tracking of open files and window controllers.
 //!
 //! GTK is single-threaded, so thread-local storage is safe here.
diff --git a/src/handlers/export.rs b/src/handlers/export.rs
index 45e980e..0b64a73 100644
--- a/src/handlers/export.rs
+++ b/src/handlers/export.rs
@@ -1,3 +1,18 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 use std::path::PathBuf;
 
 use crate::AppModel;
diff --git a/src/handlers/file.rs b/src/handlers/file.rs
index 55eaffa..615a1f7 100644
--- a/src/handlers/file.rs
+++ b/src/handlers/file.rs
@@ -1,3 +1,18 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 use std::path::PathBuf;
 
 use gtk::prelude::*;
diff --git a/src/handlers/mod.rs b/src/handlers/mod.rs
index 168feb8..235afc2 100644
--- a/src/handlers/mod.rs
+++ b/src/handlers/mod.rs
@@ -1,3 +1,18 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 pub mod export;
 pub mod file;
 pub mod view;
diff --git a/src/handlers/view.rs b/src/handlers/view.rs
index 020b756..58d44b2 100644
--- a/src/handlers/view.rs
+++ b/src/handlers/view.rs
@@ -1,3 +1,18 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 use relm4::gtk;
 
 use crate::AppModel;
diff --git a/src/handlers/zoom.rs b/src/handlers/zoom.rs
index 3acbb2c..575f5f9 100644
--- a/src/handlers/zoom.rs
+++ b/src/handlers/zoom.rs
@@ -1,3 +1,18 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 use crate::AppModel;
 use crate::constants;
 
diff --git a/src/main.rs b/src/main.rs
index 4ba95c1..60be618 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,19 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 // Suppress warnings from relm4 view! macro internals
 #![allow(unused_assignments)]
 
@@ -8,6 +24,7 @@ mod file_registry;
 mod handlers;
 mod preferences;
 mod stages;
+mod ui_helpers;
 
 mod icon_names {
     include!(concat!(env!("OUT_DIR"), "/icon_names.rs"));
diff --git a/src/preferences/mod.rs b/src/preferences/mod.rs
index 900869f..b369e88 100644
--- a/src/preferences/mod.rs
+++ b/src/preferences/mod.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 pub mod models;
 pub mod pages;
diff --git a/src/preferences/models.rs b/src/preferences/models.rs
index e980805..dee84e6 100644
--- a/src/preferences/models.rs
+++ b/src/preferences/models.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use serde::{Deserialize, Serialize};
 use uuid::Uuid;
diff --git a/src/preferences/pages/editor.rs b/src/preferences/pages/editor.rs
index 5334a37..9f10d43 100644
--- a/src/preferences/pages/editor.rs
+++ b/src/preferences/pages/editor.rs
@@ -1,22 +1,25 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use gtk::prelude::*;
 use relm4::Sender;
 use relm4::gtk;
 
+use crate::ui_helpers::create_switch_row;
+
 use super::super::models::UserPreferences;
 use super::super::window::PreferencesInput;
 
@@ -29,7 +32,7 @@ pub struct EditorPage {
 }
 
 impl EditorPage {
-    pub fn new(prefs: &UserPreferences, sender: Sender<PreferencesInput>) -> Self {
+    pub fn new(preferences: &UserPreferences, sender: Sender<PreferencesInput>) -> Self {
         let container = gtk::Box::new(gtk::Orientation::Vertical, 20);
         container.set_margin_top(20);
         container.set_margin_bottom(20);
@@ -45,7 +48,7 @@ impl EditorPage {
 
         let font_size_box = gtk::Box::new(gtk::Orientation::Horizontal, 10);
         let font_size_spin = gtk::SpinButton::with_range(7.0, 21.0, 1.0);
-        font_size_spin.set_value(prefs.editor_font_size);
+        font_size_spin.set_value(preferences.editor_font_size);
         {
             let sender = sender.clone();
             font_size_spin.connect_value_changed(move |spin| {
@@ -64,7 +67,7 @@ impl EditorPage {
         container.append(&style_label);
 
         // Soft Wrap Lines
-        let soft_wrap_row = create_switch_row("Soft Wrap Lines", prefs.soft_wrap_lines);
+        let soft_wrap_row = create_switch_row("Soft Wrap Lines", preferences.soft_wrap_lines);
         let soft_wrap_switch = soft_wrap_row.1.clone();
         {
             let sender = sender.clone();
@@ -77,7 +80,7 @@ impl EditorPage {
 
         // Use Custom Font
         let custom_font_row =
-            create_switch_row("Use Custom Editor Font", prefs.use_custom_editor_font);
+            create_switch_row("Use Custom Editor Font", preferences.use_custom_editor_font);
         let custom_font_switch = custom_font_row.1.clone();
         container.append(&custom_font_row.0);
 
@@ -88,15 +91,15 @@ impl EditorPage {
         let font_button = gtk::FontButton::new();
         font_button.set_font(&format!(
             "{} {}",
-            prefs.custom_editor_font_name, prefs.editor_font_size as i32
+            preferences.custom_editor_font_name, preferences.editor_font_size as i32
         ));
-        font_button.set_sensitive(prefs.use_custom_editor_font);
+        font_button.set_sensitive(preferences.use_custom_editor_font);
         font_button.set_hexpand(true);
         font_button.set_use_font(true);
         {
             let sender = sender.clone();
-            font_button.connect_font_set(move |btn| {
-                if let Some(font) = btn.font() {
+            font_button.connect_font_set(move |button| {
+                if let Some(font) = button.font() {
                     // Extract font family from the font string
                     let font_desc = gtk::pango::FontDescription::from_string(&font);
                     if let Some(family) = font_desc.family() {
@@ -134,30 +137,17 @@ impl EditorPage {
         self.container.clone()
     }
 
-    pub fn sync_from(&self, prefs: &UserPreferences) {
-        self.font_size_spin.set_value(prefs.editor_font_size);
-        self.soft_wrap_switch.set_active(prefs.soft_wrap_lines);
+    pub fn sync_from(&self, preferences: &UserPreferences) {
+        self.font_size_spin.set_value(preferences.editor_font_size);
+        self.soft_wrap_switch.set_active(preferences.soft_wrap_lines);
         self.custom_font_switch
-            .set_active(prefs.use_custom_editor_font);
-        self.font_button.set_sensitive(prefs.use_custom_editor_font);
+            .set_active(preferences.use_custom_editor_font);
+        self.font_button
+            .set_sensitive(preferences.use_custom_editor_font);
         self.font_button.set_font(&format!(
             "{} {}",
-            prefs.custom_editor_font_name, prefs.editor_font_size as i32
+            preferences.custom_editor_font_name, preferences.editor_font_size as i32
         ));
     }
 }
 
-fn create_switch_row(label: &str, initial_state: bool) -> (gtk::Box, gtk::Switch) {
-    let row = gtk::Box::new(gtk::Orientation::Horizontal, 10);
-    row.append(&gtk::Label::new(Some(label)));
-
-    let spacer = gtk::Box::new(gtk::Orientation::Horizontal, 0);
-    spacer.set_hexpand(true);
-    row.append(&spacer);
-
-    let switch = gtk::Switch::new();
-    switch.set_active(initial_state);
-    row.append(&switch);
-
-    (row, switch)
-}
diff --git a/src/preferences/pages/general.rs b/src/preferences/pages/general.rs
index 9c71bd4..43cd784 100644
--- a/src/preferences/pages/general.rs
+++ b/src/preferences/pages/general.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use gtk::FileFilter;
 use gtk::prelude::*;
diff --git a/src/preferences/pages/map.rs b/src/preferences/pages/map.rs
index f3537c0..8deae20 100644
--- a/src/preferences/pages/map.rs
+++ b/src/preferences/pages/map.rs
@@ -1,22 +1,25 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use gtk::prelude::*;
 use relm4::Sender;
 use relm4::gtk;
 
+use crate::ui_helpers::create_switch_row;
+
 use super::super::models::UserPreferences;
 use super::super::window::PreferencesInput;
 
@@ -30,7 +33,7 @@ pub struct MapPage {
 }
 
 impl MapPage {
-    pub fn new(prefs: &UserPreferences, sender: Sender<PreferencesInput>) -> Self {
+    pub fn new(preferences: &UserPreferences, sender: Sender<PreferencesInput>) -> Self {
         let container = gtk::Box::new(gtk::Orientation::Vertical, 20);
         container.set_margin_top(20);
         container.set_margin_bottom(20);
@@ -45,8 +48,9 @@ impl MapPage {
         container.append(&style_label);
 
         // Show Background
-        let bg_row = create_switch_row("Show Map Background", prefs.show_map_background);
-        let show_background_switch = bg_row.1.clone();
+        let background_row =
+            create_switch_row("Show Map Background", preferences.show_map_background);
+        let show_background_switch = background_row.1.clone();
         {
             let sender = sender.clone();
             show_background_switch.connect_state_set(move |_, state| {
@@ -54,12 +58,12 @@ impl MapPage {
                 gtk::glib::Propagation::Proceed
             });
         }
-        container.append(&bg_row.0);
+        container.append(&background_row.0);
 
         // Smart Label Positioning
         let smart_row = create_switch_row(
             "Use Smart Label Positioning",
-            prefs.use_smart_label_positioning,
+            preferences.use_smart_label_positioning,
         );
         let smart_positioning_switch = smart_row.1.clone();
         {
@@ -72,7 +76,7 @@ impl MapPage {
         container.append(&smart_row.0);
 
         // Use Custom Font
-        let custom_font_row = create_switch_row("Use Custom Font", prefs.use_custom_font);
+        let custom_font_row = create_switch_row("Use Custom Font", preferences.use_custom_font);
         let custom_font_switch = custom_font_row.1.clone();
         container.append(&custom_font_row.0);
 
@@ -81,14 +85,14 @@ impl MapPage {
         font_row.append(&gtk::Label::new(Some("Font")));
 
         let font_button = gtk::FontButton::new();
-        font_button.set_font(&prefs.custom_font_name);
-        font_button.set_sensitive(prefs.use_custom_font);
+        font_button.set_font(&preferences.custom_font_name);
+        font_button.set_sensitive(preferences.use_custom_font);
         font_button.set_hexpand(true);
         font_button.set_use_font(true);
         {
             let sender = sender.clone();
-            font_button.connect_font_set(move |btn| {
-                if let Some(font) = btn.font() {
+            font_button.connect_font_set(move |button| {
+                if let Some(font) = button.font() {
                     let font_desc = gtk::pango::FontDescription::from_string(&font);
                     if let Some(family) = font_desc.family() {
                         sender.emit(PreferencesInput::SetCustomFontName(family.to_string()));
@@ -122,7 +126,7 @@ impl MapPage {
 
         let formats = gtk::StringList::new(&["PNG", "SVG"]);
         let export_format_dropdown = gtk::DropDown::new(Some(formats), None::<gtk::Expression>);
-        let selected = match prefs.default_export_format.as_str() {
+        let selected = match preferences.default_export_format.as_str() {
             "svg" => 1,
             _ => 0,
         };
@@ -154,16 +158,17 @@ impl MapPage {
         self.container.clone()
     }
 
-    pub fn sync_from(&self, prefs: &UserPreferences) {
+    pub fn sync_from(&self, preferences: &UserPreferences) {
         self.show_background_switch
-            .set_active(prefs.show_map_background);
+            .set_active(preferences.show_map_background);
         self.smart_positioning_switch
-            .set_active(prefs.use_smart_label_positioning);
-        self.custom_font_switch.set_active(prefs.use_custom_font);
-        self.font_button.set_sensitive(prefs.use_custom_font);
-        self.font_button.set_font(&prefs.custom_font_name);
+            .set_active(preferences.use_smart_label_positioning);
+        self.custom_font_switch
+            .set_active(preferences.use_custom_font);
+        self.font_button.set_sensitive(preferences.use_custom_font);
+        self.font_button.set_font(&preferences.custom_font_name);
 
-        let selected = match prefs.default_export_format.as_str() {
+        let selected = match preferences.default_export_format.as_str() {
             "svg" => 1,
             _ => 0,
         };
@@ -171,17 +176,3 @@ impl MapPage {
     }
 }
 
-fn create_switch_row(label: &str, initial_state: bool) -> (gtk::Box, gtk::Switch) {
-    let row = gtk::Box::new(gtk::Orientation::Horizontal, 10);
-    row.append(&gtk::Label::new(Some(label)));
-
-    let spacer = gtk::Box::new(gtk::Orientation::Horizontal, 0);
-    spacer.set_hexpand(true);
-    row.append(&spacer);
-
-    let switch = gtk::Switch::new();
-    switch.set_active(initial_state);
-    row.append(&switch);
-
-    (row, switch)
-}
diff --git a/src/preferences/pages/mod.rs b/src/preferences/pages/mod.rs
index 3d2db71..2ace921 100644
--- a/src/preferences/pages/mod.rs
+++ b/src/preferences/pages/mod.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 pub mod editor;
 pub mod general;
diff --git a/src/preferences/pages/stages.rs b/src/preferences/pages/stages.rs
index c002bdb..6f4121e 100644
--- a/src/preferences/pages/stages.rs
+++ b/src/preferences/pages/stages.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use gtk::prelude::*;
 use relm4::Sender;
@@ -28,7 +29,7 @@ pub struct StagesPage {
 }
 
 impl StagesPage {
-    pub fn new(prefs: &UserPreferences, sender: Sender<PreferencesInput>) -> Self {
+    pub fn new(preferences: &UserPreferences, sender: Sender<PreferencesInput>) -> Self {
         let container = gtk::Box::new(gtk::Orientation::Vertical, 10);
         container.set_margin_top(20);
         container.set_margin_bottom(20);
@@ -119,7 +120,7 @@ impl StagesPage {
             sender,
         };
 
-        page.populate_stages(prefs);
+        page.populate_stages(preferences);
         page
     }
 
@@ -127,16 +128,16 @@ impl StagesPage {
         self.container.clone()
     }
 
-    pub fn refresh(&self, prefs: &UserPreferences) {
+    pub fn refresh(&self, preferences: &UserPreferences) {
         // Clear existing rows
         while let Some(child) = self.list_box.first_child() {
             self.list_box.remove(&child);
         }
-        self.populate_stages(prefs);
+        self.populate_stages(preferences);
     }
 
-    fn populate_stages(&self, prefs: &UserPreferences) {
-        for stage in &prefs.custom_stages {
+    fn populate_stages(&self, preferences: &UserPreferences) {
+        for stage in &preferences.custom_stages {
             let row = self.create_stage_row(stage.id, &stage.name, &stage.stage);
             self.list_box.append(&row);
         }
diff --git a/src/preferences/pages/templates.rs b/src/preferences/pages/templates.rs
index 2611896..da3cafc 100644
--- a/src/preferences/pages/templates.rs
+++ b/src/preferences/pages/templates.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::cell::RefCell;
 use std::rc::Rc;
diff --git a/src/preferences/storage.rs b/src/preferences/storage.rs
index 83db786..b61266b 100644
--- a/src/preferences/storage.rs
+++ b/src/preferences/storage.rs
@@ -1,17 +1,18 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::fs;
 use std::path::PathBuf;
@@ -47,30 +48,30 @@ pub fn load() -> UserPreferences {
 }
 
 /// Saves preferences to disk
-pub fn save(prefs: &UserPreferences) -> Result<(), std::io::Error> {
+pub fn save(preferences: &UserPreferences) -> Result<(), std::io::Error> {
     let path = preferences_path();
 
     if let Some(parent) = path.parent() {
         fs::create_dir_all(parent)?;
     }
 
-    let content = serde_json::to_string_pretty(prefs).map_err(std::io::Error::other)?;
+    let content = serde_json::to_string_pretty(preferences).map_err(std::io::Error::other)?;
 
     fs::write(path, content)
 }
 
 /// Exports preferences to JSON string (for file export)
-pub fn export_json(prefs: &UserPreferences) -> Option<String> {
-    let json_prefs = prefs.to_json();
-    serde_json::to_string_pretty(&json_prefs).ok()
+pub fn export_json(preferences: &UserPreferences) -> Option<String> {
+    let json_preferences = preferences.to_json();
+    serde_json::to_string_pretty(&json_preferences).ok()
 }
 
 /// Imports preferences from JSON string (partial updates supported)
 /// Returns true on success, false on parse error
-pub fn import_json(prefs: &mut UserPreferences, json: &str) -> bool {
+pub fn import_json(preferences: &mut UserPreferences, json: &str) -> bool {
     match serde_json::from_str::<UserPreferencesJson>(json) {
         Ok(imported) => {
-            prefs.update_from_json(&imported);
+            preferences.update_from_json(&imported);
             true
         }
         Err(_) => false,
@@ -78,16 +79,19 @@ pub fn import_json(prefs: &mut UserPreferences, json: &str) -> bool {
 }
 
 /// Saves preferences to a specific file path (for export dialog)
-pub fn export_to_file(prefs: &UserPreferences, path: &PathBuf) -> Result<(), std::io::Error> {
+pub fn export_to_file(preferences: &UserPreferences, path: &PathBuf) -> Result<(), std::io::Error> {
     let content =
-        export_json(prefs).ok_or_else(|| std::io::Error::other("Serialization failed"))?;
+        export_json(preferences).ok_or_else(|| std::io::Error::other("Serialization failed"))?;
     fs::write(path, content)
 }
 
 /// Loads preferences from a specific file path (for import dialog)
-pub fn import_from_file(prefs: &mut UserPreferences, path: &PathBuf) -> Result<(), std::io::Error> {
+pub fn import_from_file(
+    preferences: &mut UserPreferences,
+    path: &PathBuf,
+) -> Result<(), std::io::Error> {
     let content = fs::read_to_string(path)?;
-    if import_json(prefs, &content) {
+    if import_json(preferences, &content) {
         Ok(())
     } else {
         Err(std::io::Error::new(
diff --git a/src/preferences/window.rs b/src/preferences/window.rs
index 7daa926..8b38c29 100644
--- a/src/preferences/window.rs
+++ b/src/preferences/window.rs
@@ -1,20 +1,21 @@
-// Copyright (C) 2024 Rubén Beltrán del Río
-
-// Suppress warnings from relm4 view! macro internals
-#![allow(unused_assignments)]
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
 
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
+// it under the terms of the GNU Affero General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// GNU Affero General Public License for more details.
 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see https://map.tranquil.systems.
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// Suppress warnings from relm4 view! macro internals
+#![allow(unused_assignments)]
 
 use std::path::PathBuf;
 
@@ -137,18 +138,19 @@ impl SimpleComponent for PreferencesWindow {
     }
 
     fn init(
-        prefs: Self::Init,
+        preferences: Self::Init,
         root: Self::Root,
         sender: ComponentSender<Self>,
     ) -> ComponentParts<Self> {
         let general_page = general::GeneralPage::new(sender.input_sender().clone());
-        let editor_page = editor::EditorPage::new(&prefs, sender.input_sender().clone());
-        let map_page = map::MapPage::new(&prefs, sender.input_sender().clone());
-        let stages_page = stages::StagesPage::new(&prefs, sender.input_sender().clone());
-        let templates_page = templates::TemplatesPage::new(&prefs, sender.input_sender().clone());
+        let editor_page = editor::EditorPage::new(&preferences, sender.input_sender().clone());
+        let map_page = map::MapPage::new(&preferences, sender.input_sender().clone());
+        let stages_page = stages::StagesPage::new(&preferences, sender.input_sender().clone());
+        let templates_page =
+            templates::TemplatesPage::new(&preferences, sender.input_sender().clone());
 
         let model = PreferencesWindow {
-            preferences: prefs,
+            preferences,
             window: root.clone(),
             general_page,
             editor_page,
diff --git a/src/stages.rs b/src/stages.rs
index 278cd92..fba86b3 100644
--- a/src/stages.rs
+++ b/src/stages.rs
@@ -1,3 +1,19 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 use wmap_renderer::StageType;
 
 /// All available stage types for rendering Wardley Maps.
diff --git a/src/ui_helpers.rs b/src/ui_helpers.rs
new file mode 100644
index 0000000..6737c62
--- /dev/null
+++ b/src/ui_helpers.rs
@@ -0,0 +1,34 @@
+// Map, wardley map editor for linux
+// Copyright (C) 2026 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use gtk::prelude::*;
+use relm4::gtk;
+
+/// Creates a horizontal row with a label on the left and a switch on the right.
+pub fn create_switch_row(label: &str, initial_state: bool) -> (gtk::Box, gtk::Switch) {
+    let row = gtk::Box::new(gtk::Orientation::Horizontal, 10);
+    row.append(&gtk::Label::new(Some(label)));
+
+    let spacer = gtk::Box::new(gtk::Orientation::Horizontal, 0);
+    spacer.set_hexpand(true);
+    row.append(&spacer);
+
+    let switch = gtk::Switch::new();
+    switch.set_active(initial_state);
+    row.append(&switch);
+
+    (row, switch)
+}