diff --git a/topola-egui/src/displayer.rs b/topola-egui/src/displayer.rs
index b051bcc..5ac4979 100644
--- a/topola-egui/src/displayer.rs
+++ b/topola-egui/src/displayer.rs
@@ -2,9 +2,8 @@
 //
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
-use egui::Pos2;
-
 use crate::{viewport::Viewport, workspace::Workspace};
+use topola::{Joint, Polygon};
 
 pub struct Displayer {}
 
@@ -47,11 +46,47 @@ impl Displayer {
         );
 
         for (_, joint) in workspace.board.layout().joints().collection() {
-            ui.painter().circle_filled(
-                egui::Pos2::new(joint.position[0] as f32, joint.position[1] as f32),
-                joint.radius as f32,
-                egui::Color32::RED,
-            );
+            self.paint_joint(ctx, ui, viewport, joint);
+        }
+
+        // TODO.
+
+        for (_, polygon) in workspace.board.layout().polygons().collection() {
+            self.paint_polygon(ctx, ui, viewport, polygon);
         }
     }
+
+    fn paint_joint(
+        &mut self,
+        ctx: &egui::Context,
+        ui: &egui::Ui,
+        viewport: &Viewport,
+        joint: &Joint,
+    ) {
+        ui.painter().circle_filled(
+            egui::Pos2::new(joint.position[0] as f32, joint.position[1] as f32),
+            joint.radius as f32,
+            egui::Color32::RED,
+        );
+    }
+
+    fn paint_polygon(
+        &mut self,
+        ctx: &egui::Context,
+        ui: &egui::Ui,
+        viewport: &Viewport,
+        polygon: &Polygon,
+    ) {
+        let points: Vec<egui::Pos2> = polygon
+            .vertices
+            .iter()
+            .map(|v| egui::pos2(v[0] as f32, v[1] as f32))
+            .collect();
+
+        ui.painter().add(egui::Shape::convex_polygon(
+            points,
+            egui::Color32::RED,
+            egui::Stroke::new(5.0 / viewport.scale_factor(), egui::Color32::RED),
+        ));
+    }
 }
diff --git a/topola/src/lib.rs b/topola/src/lib.rs
index 8e19d70..0fc6f4b 100644
--- a/topola/src/lib.rs
+++ b/topola/src/lib.rs
@@ -9,3 +9,6 @@ mod navmesher;
 mod specctra;
 
 pub use crate::board::Board;
+pub use crate::layout::{
+    Joint, JointId, Layout, Polygon, PolygonId, Segment, SegmentId, Via, ViaId,
+};
diff --git a/topola/src/specctra.rs b/topola/src/specctra.rs
index 6de81f5..daba450 100644
--- a/topola/src/specctra.rs
+++ b/topola/src/specctra.rs
@@ -7,7 +7,11 @@ use specctra::{
     structure::{DsnFile, Shape},
 };
 
-use crate::{board::Board, layout::Joint, math::Vector2};
+use crate::{
+    board::Board,
+    layout::{Joint, Polygon},
+    math::Vector2,
+};
 
 impl Board {
     pub fn from_specctra(dsn: DsnFile) -> Self {
@@ -51,6 +55,17 @@ impl Board {
                                 (circle.diameter / 2.0) as u64,
                                 false,
                             ),
+                            Shape::Rect(rect) => Self::place_rect(
+                                &mut board,
+                                place.point_with_rotation(),
+                                pin.point_with_rotation(),
+                                rect.x1,
+                                rect.y1,
+                                rect.x2,
+                                rect.y2,
+                                0,
+                                false,
+                            ),
                             _ => (),
                         }
                     }
@@ -76,7 +91,7 @@ impl Board {
         });
     }
 
-    /*pub fn place_rect(
+    pub fn place_rect(
         board: &mut Board,
         place: PointWithRotation,
         pin: PointWithRotation,
@@ -88,15 +103,15 @@ impl Board {
         flip: bool,
     ) {
         board.add_polygon(Polygon {
-            vertices: [
+            vertices: vec![
                 Self::pos(place, pin, x1, y1, flip),
                 Self::pos(place, pin, x2, y1, flip),
                 Self::pos(place, pin, x2, y2, flip),
                 Self::pos(place, pin, x1, y2, flip),
             ],
             layer,
-        })
-    }*/
+        });
+    }
 
     fn pos(
         place: PointWithRotation,