diff --git a/crates/fj-viewer/src/screen.rs b/crates/fj-viewer/src/screen.rs
index 0eae41ddb..83805102c 100644
--- a/crates/fj-viewer/src/screen.rs
+++ b/crates/fj-viewer/src/screen.rs
@@ -9,9 +9,6 @@ pub trait Screen {
     /// The window
     type Window: HasDisplayHandle + HasWindowHandle + Send + Sync + 'static;
 
-    /// Access the size of the screen
-    fn size(&self) -> ScreenSize;
-
     /// Access the window
     fn window(&self) -> Arc<Self::Window>;
 }
diff --git a/crates/fj-viewer/src/viewer.rs b/crates/fj-viewer/src/viewer.rs
index be8def7c9..131b07dce 100644
--- a/crates/fj-viewer/src/viewer.rs
+++ b/crates/fj-viewer/src/viewer.rs
@@ -10,7 +10,7 @@ use crate::{
         CameraTuningConfig, DEFAULT_CAMERA_TUNING_CONFIG, InputEvent,
         MouseButton,
     },
-    screen::{NormalizedScreenPosition, Screen, ScreenSize},
+    screen::{NormalizedScreenPosition, ScreenSize},
     window::Window,
 };
 
diff --git a/crates/fj-viewer/src/window.rs b/crates/fj-viewer/src/window.rs
index 53403e18e..869f4df44 100644
--- a/crates/fj-viewer/src/window.rs
+++ b/crates/fj-viewer/src/window.rs
@@ -44,12 +44,8 @@ impl Window {
             inner: Arc::new(window),
         })
     }
-}
 
-impl Screen for Window {
-    type Window = winit::window::Window;
-
-    fn size(&self) -> ScreenSize {
+    pub fn size(&self) -> ScreenSize {
         let size = self.inner.inner_size();
 
         ScreenSize {
@@ -57,6 +53,10 @@ impl Screen for Window {
             height: size.height,
         }
     }
+}
+
+impl Screen for Window {
+    type Window = winit::window::Window;
 
     fn window(&self) -> Arc<Self::Window> {
         self.inner.clone()