diff --git a/rgis-ui/src/lib.rs b/rgis-ui/src/lib.rs
index 04e6e81..7485126 100644
--- a/rgis-ui/src/lib.rs
+++ b/rgis-ui/src/lib.rs
@@ -22,6 +22,7 @@ mod operation_window;
 mod side_panel;
 mod systems;
 mod top_panel;
+mod welcome_window;
 mod widgets;
 
 trait Window: egui::Widget + SystemParam + Send + Sync {
@@ -29,6 +30,9 @@ trait Window: egui::Widget + SystemParam + Send + Sync {
 
     fn title(&self) -> &str;
     fn default_width(&self) -> f32;
+    fn default_anchor(&self) -> (egui::Align2, [f32; 2]) {
+        (egui::Align2::LEFT_TOP, [0., 0.])
+    }
 }
 
 pub struct Plugin;
@@ -79,4 +83,8 @@ impl<W: Window + Send + Sync> IsWindowOpen<W> {
     fn closed() -> Self {
         Self(false, marker::PhantomData)
     }
+
+    fn open() -> Self {
+        Self(true, marker::PhantomData)
+    }
 }
diff --git a/rgis-ui/src/systems.rs b/rgis-ui/src/systems.rs
index c594893..0d84373 100644
--- a/rgis-ui/src/systems.rs
+++ b/rgis-ui/src/systems.rs
@@ -376,7 +376,12 @@ pub fn configure(app: &mut App) {
     );
 
     app.insert_resource(crate::IsWindowOpen::<crate::debug_window::DebugWindow>::closed());
+    app.insert_resource(crate::IsWindowOpen::<crate::welcome_window::WelcomeWindow>::open());
     app.add_systems(Update, render_window::<crate::debug_window::DebugWindow>);
+    app.add_systems(
+        Update,
+        render_window::<crate::welcome_window::WelcomeWindow>,
+    );
 }
 
 fn render_window<W: Window + 'static>(
@@ -386,11 +391,13 @@ fn render_window<W: Window + 'static>(
 ) {
     if is_window_open.0 {
         let mut egui_ctx = egui_ctx_query.single_mut();
+        let (anchor_align, anchor_offset) = window.default_anchor();
 
         egui::Window::new(window.title())
             .default_width(window.default_width())
             .open(&mut is_window_open.0)
             .resizable(false)
+            .anchor(anchor_align, anchor_offset)
             .show(egui_ctx.get_mut(), |ui| {
                 ui.add(window);
             });
diff --git a/rgis-ui/src/welcome_window.rs b/rgis-ui/src/welcome_window.rs
new file mode 100644
index 0000000..f1cff60
--- /dev/null
+++ b/rgis-ui/src/welcome_window.rs
@@ -0,0 +1,33 @@
+use bevy::ecs::system::SystemParam;
+use bevy_egui::egui;
+use std::marker;
+
+#[derive(SystemParam)]
+pub(crate) struct WelcomeWindow<'w, 's> {
+    _phantom: marker::PhantomData<(&'w (), &'s ())>,
+}
+
+impl<'w, 's> egui::Widget for WelcomeWindow<'w, 's> {
+    fn ui(self, ui: &mut egui::Ui) -> egui::Response {
+        ui.vertical_centered_justified(|ui| {
+            ui.label("Welcome to rgis!");
+        })
+        .response
+    }
+}
+
+impl crate::Window for WelcomeWindow<'_, '_> {
+    type Item<'w, 's> = WelcomeWindow<'w, 's>;
+
+    fn title(&self) -> &str {
+        "Welcome"
+    }
+
+    fn default_width(&self) -> f32 {
+        300.0
+    }
+
+    fn default_anchor(&self) -> (egui::Align2, [f32; 2]) {
+        (egui::Align2::CENTER_CENTER, [0., 0.])
+    }
+}