diff --git a/crates/composition/src/builder.rs b/crates/composition/src/builder.rs
index 88790a2..1c1c83c 100644
--- a/crates/composition/src/builder.rs
+++ b/crates/composition/src/builder.rs
@@ -137,7 +137,7 @@ impl LayerShika<NeedsComponent> {
 
 impl LayerShika<HasComponent> {
     #[must_use]
-    pub fn dimensions(mut self, width: u32, height: u32) -> Self {
+    pub fn size(mut self, width: u32, height: u32) -> Self {
         self.config.dimensions = WindowDimension::new(width, height);
         self
     }
diff --git a/crates/composition/src/lib.rs b/crates/composition/src/lib.rs
index cb515df..82b5990 100644
--- a/crates/composition/src/lib.rs
+++ b/crates/composition/src/lib.rs
@@ -75,7 +75,9 @@ pub mod prelude {
 
     pub use crate::{slint, slint_interpreter};
 
-    pub use layer_shika_domain::prelude::{Margins, ScaleFactor, WindowConfig, WindowDimension};
+    pub use layer_shika_domain::prelude::{
+        LogicalSize, Margins, PhysicalSize, ScaleFactor, WindowConfig, WindowDimension,
+    };
 
     pub use layer_shika_adapters::platform::wayland::Anchor;
 }
diff --git a/crates/domain/src/value_objects/output_policy.rs b/crates/domain/src/value_objects/output_policy.rs
index 62633da..4fa1090 100644
--- a/crates/domain/src/value_objects/output_policy.rs
+++ b/crates/domain/src/value_objects/output_policy.rs
@@ -1,10 +1,14 @@
 use crate::value_objects::output_info::OutputInfo;
 use std::fmt;
+use std::rc::Rc;
 
+type OutputFilter = Rc<dyn Fn(&OutputInfo) -> bool>;
+
+#[derive(Clone)]
 pub enum OutputPolicy {
     AllOutputs,
     PrimaryOnly,
-    Custom(Box<dyn Fn(&OutputInfo) -> bool>),
+    Custom(OutputFilter),
 }
 
 impl OutputPolicy {
@@ -28,7 +32,7 @@ impl OutputPolicy {
     where
         F: Fn(&OutputInfo) -> bool + 'static,
     {
-        Self::Custom(Box::new(filter))
+        Self::Custom(Rc::new(filter))
     }
 }
 
@@ -38,21 +42,12 @@ impl Default for OutputPolicy {
     }
 }
 
-impl Clone for OutputPolicy {
-    fn clone(&self) -> Self {
-        match self {
-            OutputPolicy::AllOutputs | OutputPolicy::Custom(_) => OutputPolicy::AllOutputs,
-            OutputPolicy::PrimaryOnly => OutputPolicy::PrimaryOnly,
-        }
-    }
-}
-
 impl fmt::Debug for OutputPolicy {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             OutputPolicy::AllOutputs => write!(f, "OutputPolicy::AllOutputs"),
             OutputPolicy::PrimaryOnly => write!(f, "OutputPolicy::PrimaryOnly"),
-            OutputPolicy::Custom(_) => write!(f, "OutputPolicy::Custom(<function>)"),
+            OutputPolicy::Custom(_) => write!(f, "OutputPolicy::Custom(<filter>)"),
         }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index ef0a2c8..977bad9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,7 +22,7 @@
 //! ```rust,no_run
 //! use layer_shika::prelude::*;
 //!
-//! LayerShika::from_file("ui/main.slint", Some("AppWindow"))?
+//! LayerShika::from_file("ui/main.slint")?
 //!     .height(42)
 //!     .anchor(AnchorEdges::top_bar())
 //!     .exclusive_zone(42)
@@ -63,10 +63,10 @@
 pub mod prelude;
 
 pub use layer_shika_composition::{
-    AnchorEdges, AnchorStrategy, Error, EventContext, EventLoopHandle, KeyboardInteractivity,
-    Layer, LayerShika, OutputGeometry, OutputHandle, OutputInfo, OutputPolicy, OutputRegistry,
-    PopupHandle, PopupPlacement, PopupPositioningMode, PopupRequest, PopupSize, PopupWindow,
-    Result, ShellControl, ShellRuntime, SingleWindowShell, DEFAULT_WINDOW_NAME,
+    AnchorEdges, AnchorStrategy, DEFAULT_WINDOW_NAME, Error, EventContext, EventLoopHandle,
+    KeyboardInteractivity, Layer, LayerShika, OutputGeometry, OutputHandle, OutputInfo,
+    OutputPolicy, OutputRegistry, PopupHandle, PopupPlacement, PopupPositioningMode, PopupRequest,
+    PopupSize, PopupWindow, Result, ShellControl, ShellRuntime, SingleWindowShell,
 };
 
 pub use layer_shika_composition::{
diff --git a/src/prelude.rs b/src/prelude.rs
index 17957d2..da1be21 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -9,8 +9,8 @@
 #![allow(clippy::pub_use)]
 
 pub use crate::{
-    Error, EventContext, EventLoopHandle, LayerShika, PopupWindow, Result, ShellControl,
-    ShellRuntime, SingleWindowShell, DEFAULT_WINDOW_NAME,
+    DEFAULT_WINDOW_NAME, Error, EventContext, EventLoopHandle, LayerShika, PopupWindow, Result,
+    ShellControl, ShellRuntime, SingleWindowShell,
 };
 
 pub use crate::{
@@ -25,7 +25,7 @@ pub use crate::{
 };
 
 pub use layer_shika_composition::prelude::{
-    Anchor, Margins, ScaleFactor, WindowConfig, WindowDimension,
+    Anchor, LogicalSize, Margins, PhysicalSize, ScaleFactor, WindowConfig, WindowDimension,
 };
 
 pub use crate::calloop;