diff --git a/comdel/display/component_display.cpp b/comdel/display/component_display.cpp
index d9a89e0..14e856a 100644
--- a/comdel/display/component_display.cpp
+++ b/comdel/display/component_display.cpp
@@ -51,6 +51,9 @@ void Bus::contextMenuEvent(QGraphicsSceneContextMenuEvent *event) {
             QPointF newPos = value.toPointF();
             busInstance->position.first = newPos.x();
             busInstance->position.second = newPos.y();
+
+            auto view = dynamic_cast<Schema*>(scene()->views()[0]);
+            view->updateConnections();
         }
         return QGraphicsItem::itemChange(change, value);
     }
@@ -62,7 +65,33 @@ void Bus::contextMenuEvent(QGraphicsSceneContextMenuEvent *event) {
             QPointF newPos = value.toPointF();
             componentInstance->position.first = newPos.x();
             componentInstance->position.second = newPos.y();
+
+            auto view = dynamic_cast<Schema*>(scene()->views()[0]);
+            view->updateConnections();
         }
         return QGraphicsItem::itemChange(change, value);
     }
+
+    void BusConnection::contextMenuEvent(QGraphicsSceneContextMenuEvent *event) {
+        QMenu menu;
+        menu.addAction("Ukloni poveznicu", [this](){});
+        menu.addSeparator();
+        for(int i=0; i<this->connection->attributes.size(); i++) {
+            auto* attr = &this->connection->attributes[i];
+            bool enabled = attr->attribute.getPopup().has_value();
+
+            auto action = menu.addAction(QString::fromStdString("Izmjeni " + attr->name),
+                                         [attr]() {
+                                             if(attr->value.getType() == domain::Value::MEMORY_REFERENCE) {
+                                                 auto dialog = new MemoryDialog(attr, MainWindow::getSchema()->componentInstances);
+                                                 dialog->exec();
+                                             } else {
+                                                 auto dialog = new AttributeDialog(attr);
+                                                 dialog->exec();
+                                             }
+                                         });
+            action->setEnabled(enabled);
+        }
+        menu.exec(event->screenPos());
+    }
 } // namespace display
diff --git a/comdel/display/component_display.h b/comdel/display/component_display.h
index 1fbe5e1..548eec5 100644
--- a/comdel/display/component_display.h
+++ b/comdel/display/component_display.h
@@ -5,6 +5,7 @@
 #include <comdel/domain/wireinstance.h>
 
 #include <QGraphicsItemGroup>
+#include "comdel/domain/connectioninstance.h"
 
 namespace display {
 
@@ -14,7 +15,7 @@ private:
     domain::Pin pin;
 public:
     Pin(domain::Pin pin): pin(pin) {
-        pin.getDisplay().render(this);
+        pin.getDisplayPin().render(this);
     }
 };
 
@@ -90,6 +91,29 @@ protected:
     virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
 };
 
+class BusConnection: public QGraphicsLineItem
+{
+private:
+    domain::BusConnectionInstance* connection;
+    ComponentGroup* component;
+    BusGroup* bus;
+
+public:
+    BusConnection(domain::BusConnectionInstance* connection, ComponentGroup *component, BusGroup *bus): connection(connection), component(component), bus(bus) {
+        updateConnection();
+
+        setHandlesChildEvents(false);
+    }
+
+    void updateConnection() {
+        auto busPosition = bus->boundingRect();
+        auto pin = connection->instance->component.getPin(connection->connection.getComponent().pin).getDisplayPin();
+
+        setLine(connection->instance->position.first + pin.getConnectionX(), connection->instance->position.second + pin.getConnectionY(),  connection->bus->position.first + busPosition.width()/2, connection->bus->position.second + busPosition.height()/2);
+    }
+
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
+};
 
 
 } // namespace display
diff --git a/comdel/display/schema_display.cpp b/comdel/display/schema_display.cpp
index 7ff29c3..dd546a3 100644
--- a/comdel/display/schema_display.cpp
+++ b/comdel/display/schema_display.cpp
@@ -11,18 +11,42 @@ Schema::Schema()
 
 void Schema::setSchema(domain::Schema* _schema)
 {
+    std::map<std::string, display::ComponentGroup*> components;
+    std::map<std::string, display::BusGroup*> buses;
+
     scene.clear();
+    connections.clear();
     this->schema = _schema;
     if(schema != nullptr) {
         for(auto &instance: schema->componentInstances) {
-            scene.addItem(new display::ComponentGroup(instance));
+            auto group = new display::ComponentGroup(instance);
+            components.insert(std::make_pair(instance->name, group));
+            scene.addItem(group);
         }
         for(auto &instance: schema->busInstances) {
             if(instance->bus.getDisplay().has_value()) {
-                scene.addItem(new display::BusGroup(instance));
+                auto group = new display::BusGroup(instance);
+                buses.insert(std::make_pair(instance->name, group));
+                scene.addItem(group);
+            }
+        }
+        for(auto &connection: schema->connections) {
+            auto busInstance = dynamic_cast<domain::BusConnectionInstance*>(connection.get());
+            if(busInstance != nullptr) {
+                auto con = new display::BusConnection(busInstance, components[busInstance->instance->name], buses[busInstance->bus->name]);
+                connections.push_back(con);
+                scene.addItem(con);
             }
         }
     }
 }
 
+void Schema::updateConnections() {
+    if(schema != nullptr) {
+        for(auto conn: connections) {
+            conn->updateConnection();
+        }
+    }
+}
+
 } // namespace display
diff --git a/comdel/display/schema_display.h b/comdel/display/schema_display.h
index 06a4a86..db7ad98 100644
--- a/comdel/display/schema_display.h
+++ b/comdel/display/schema_display.h
@@ -9,13 +9,19 @@
 
 namespace display {
 
+    class BusConnection;
+
 class Schema: public QGraphicsView
 {
 public:
     Schema();
 
+    std::vector<BusConnection*> connections;
+
     void setSchema(domain::Schema* schema);
 
+    void updateConnections();
+
 private:
     QGraphicsScene scene;
 
diff --git a/comdel/domain/display.h b/comdel/domain/display.h
index 4278e99..cc46f8f 100644
--- a/comdel/domain/display.h
+++ b/comdel/domain/display.h
@@ -61,10 +61,90 @@ public:
     PinType pinType;
     int x, y, w, h;
 
-    Pin(int x, int y, int w, int h): x(x), y(y), w(w), h(h) {}
+    Pin(int x, int y, int w, int h, Orientation orientation, PinType pinType): x(x), y(y), w(w), h(h), orientation(orientation), pinType(pinType) {}
+
+    void renderIn(QGraphicsItemGroup *group) {
+        QPolygon polygon;
+
+        switch (orientation) {
+            case Orientation::TOP:
+                polygon << QPoint(x, y) << QPoint(x, y+h) << QPoint(x+w, y+h)  << QPoint(x+w, y) << QPoint(x+w/2, y+h/2);
+                break;
+            case Orientation::BOTTOM:
+                polygon << QPoint(x, y) << QPoint(x, y+h) << QPoint(x+w/2, y+h/2) << QPoint(x+w, y+h)  << QPoint(x+w, y);
+                break;
+            case Orientation::LEFT:
+                polygon << QPoint(x, y) << QPoint(x+w/2, y+h/2) << QPoint(x, y+h) << QPoint(x+w, y+h)  << QPoint(x+w, y);
+                break;
+            case Orientation::RIGHT:
+                polygon << QPoint(x, y) << QPoint(x, y+h) << QPoint(x+w, y+h) << QPoint(x+w/2, y+h/2) << QPoint(x+w, y);
+                break;
+        }
+        group->addToGroup(new QGraphicsPolygonItem(polygon));
+    }
+
+    void renderOut(QGraphicsItemGroup *group) {
+        QPolygon polygon;
+
+        switch (orientation) {
+            case Orientation::TOP:
+                polygon << QPoint(x, y+h/2) << QPoint(x, y+h) << QPoint(x+w, y+h) << QPoint(x+w, y+h/2) << QPoint(x+w/2, y);
+                break;
+            case Orientation::BOTTOM:
+                polygon << QPoint(x, y) << QPoint(x, y+h/2) << QPoint(x+w/2, y+h) << QPoint(x+w, y+h/2) << QPoint(x+w, y);
+                break;
+            case Orientation::LEFT:
+                polygon << QPoint(x+w, y) << QPoint(x+w/2, y) << QPoint(x, y+h/2) << QPoint(x+w/2, y+h) << QPoint(x+w, y+w);
+                break;
+            case Orientation::RIGHT:
+                polygon << QPoint(x, y) << QPoint(x, y+h) << QPoint(x+w/2, y+h) << QPoint(x+w, y+h/2) << QPoint(x+w/2, y);
+                break;
+        }
+        group->addToGroup(new QGraphicsPolygonItem(polygon));
+    }
+
+    void renderInOut(QGraphicsItemGroup *group) {
+        group->addToGroup(new QGraphicsRectItem(x, y ,w, h));
+    }
 
     void render(QGraphicsItemGroup *group) {
-        group->addToGroup(new QGraphicsRectItem(x,y,w,h));
+        switch (pinType) {
+            case PinType::IN:
+                renderIn(group);
+                break;
+            case PinType::OUT:
+                renderOut(group);
+                break;
+            case PinType::IN_OUT:
+                renderInOut(group);
+                break;
+        }
+    }
+
+    int getConnectionX() {
+        switch (orientation) {
+            case ui::Orientation::TOP:
+            case ui::Orientation::BOTTOM:
+                return x+w/2;
+            case ui::Orientation::LEFT:
+                return x;
+            case ui::Orientation::RIGHT:
+                return x+w;
+        }
+        return 0;
+    }
+
+    int getConnectionY() {
+        switch (orientation) {
+            case ui::Orientation::LEFT:
+            case ui::Orientation::RIGHT:
+                return y+h/2;
+            case ui::Orientation::TOP:
+                return y;
+            case ui::Orientation::BOTTOM:
+                return y+h;
+        }
+        return 0;
     }
 };
 
@@ -109,6 +189,8 @@ public:
         }
     }
 
+    std::vector<ui::Item>& getItems() {return items;}
+
 private:
     std::vector<ui::Item> items;
 };
diff --git a/comdel/domain/pin.cpp b/comdel/domain/pin.cpp
index 183e8b6..c6ede24 100644
--- a/comdel/domain/pin.cpp
+++ b/comdel/domain/pin.cpp
@@ -14,8 +14,8 @@ std::string PinConnection::getMessage() {
 }
 
 
-Pin::Pin(std::string name, PinType type, std::string tooltip, PinConnection connection, Display display, std::optional<std::vector<Value>> wires)
-    : name(name), type(type), tooltip(tooltip), connection(connection), display(display), wires(wires)
+Pin::Pin(std::string name, PinType type, std::string tooltip, PinConnection connection, domain::ui::Pin pin, std::optional<std::vector<Value>> wires)
+    : name(name), type(type), tooltip(tooltip), connection(connection), displayPin(pin), wires(wires)
 {}
 
 std::string &Pin::getName() {
@@ -27,8 +27,8 @@ Pin::PinType Pin::getType() {
 std::string Pin::getTooltip() {
     return tooltip;
 }
-Display &Pin::getDisplay() {
-    return display;
+ui::Pin &Pin::getDisplayPin() {
+    return displayPin;
 }
 PinConnection &Pin::getConnection() {
     return connection;
diff --git a/comdel/domain/pin.h b/comdel/domain/pin.h
index 843d7b4..87dbe33 100644
--- a/comdel/domain/pin.h
+++ b/comdel/domain/pin.h
@@ -43,17 +43,17 @@ private:
     PinType type;
     std::string tooltip;
     PinConnection connection;
-    Display display;
+    domain::ui::Pin displayPin;
 
     std::optional<std::vector<Value>> wires;
 
 public:
-    Pin(std::string name, PinType type, std::string tooltip, PinConnection connection, Display display, std::optional<std::vector<Value>> wires);
+    Pin(std::string name, PinType type, std::string tooltip, PinConnection connection, domain::ui::Pin pin, std::optional<std::vector<Value>> wires);
 
     std::string &getName();
     PinType getType();
     std::string getTooltip();
-    Display &getDisplay();
+    ui::Pin &getDisplayPin();
     PinConnection &getConnection();
     std::optional<std::vector<Value>> &getWires();
 };
diff --git a/comdel/domain/schemacreator.cpp b/comdel/domain/schemacreator.cpp
index aa14599..1d5d68c 100644
--- a/comdel/domain/schemacreator.cpp
+++ b/comdel/domain/schemacreator.cpp
@@ -542,6 +542,12 @@ optional<Pin> SchemaCreator::loadPin(PinNode node)
     if(!display) {
         return nullopt;
     }
+    if(display->getItems().size() != 1 || !display->getItems()[0].pin.has_value()) {
+        errors.emplace_back(node.span, "@display must contain only exactly one pin definition");
+        return nullopt;
+    }
+    ui::Pin displayPin = *display->getItems()[0].pin;
+
 
     if(!node.connection) {
         errors.emplace_back(node.span, "missing @connection");
@@ -565,16 +571,7 @@ optional<Pin> SchemaCreator::loadPin(PinNode node)
         wiresOpt = wires;
     }
 
-    return Pin(name, type, tooltip, connection, *display, wiresOpt);
-}
-
-int getIntProperty(DisplayItemNode &node, std::string property) {
-    for(auto& prop: node.values) {
-        if(prop.key.value == property) {
-            return prop.value.asInt();
-        }
-    }
-    throw std::exception();
+    return Pin(name, type, tooltip, connection, displayPin, wiresOpt);
 }
 
 std::optional<Display> SchemaCreator::loadDisplay(DisplayNode node)
@@ -584,26 +581,53 @@ std::optional<Display> SchemaCreator::loadDisplay(DisplayNode node)
         ui::Item displayItem;
         std::string type = item.type.value;
         if(type == "rect") {
-            int x, y, w, h;
-            x = getIntProperty(item, "x");
-            y = getIntProperty(item, "y");
-            w = getIntProperty(item, "w");
-            h = getIntProperty(item, "h");
+            long long int x, y, w, h;
+            x = item.asInt(&errors, "x");
+            y = item.asInt(&errors, "y");
+            w = item.asInt(&errors, "w");
+            h = item.asInt(&errors, "h");
             displayItem.rect = ui::Rect(x, y, w, h);
         } else if(type == "line") {
-            int x1, y1, x2, y2;
-            x1 = getIntProperty(item, "x1");
-            y1 = getIntProperty(item, "y1");
-            x2 = getIntProperty(item, "x2");
-            y2 = getIntProperty(item, "y2");
+            long long int x1, y1, x2, y2;
+            x1 = item.asInt(&errors, "x1");
+            y1 = item.asInt(&errors, "y1");
+            x2 = item.asInt(&errors, "x2");
+            y2 = item.asInt(&errors, "y2");
             displayItem.line = ui::Line(x1, y1, x2, y2);
         } else if(type == "pin") {
-            int x, y, w, h;
-            x = getIntProperty(item, "x");
-            y = getIntProperty(item, "y");
-            w = getIntProperty(item, "w");
-            h = getIntProperty(item, "h");
-            displayItem.pin = ui::Pin(x, y, w, h);
+            long long int x, y, w, h;
+            x = item.asInt(&errors, "x");
+            y = item.asInt(&errors, "y");
+            w = item.asInt(&errors, "w");
+            h = item.asInt(&errors, "h");
+            std::string _orientation = item.asString(&errors, "orientation", "bottom");
+            std::string _pinType = item.asString(&errors, "type", "out");
+
+            ui::Orientation orientation;
+            if(_orientation == "left") {
+                orientation = ui::Orientation::LEFT;
+            } else if(_orientation == "right") {
+                orientation = ui::Orientation::RIGHT;
+            } else if(_orientation == "top") {
+                orientation = ui::Orientation::TOP;
+            } else if(_orientation == "bottom") {
+                orientation = ui::Orientation::BOTTOM;
+            } else {
+                errors.emplace_back(item.span, "unknown orientation type '" + _orientation + "'");
+            }
+
+            ui::PinType pinType;
+            if(_pinType == "in") {
+                pinType = ui::PinType::IN;
+            } else if(_pinType == "out") {
+                pinType = ui::PinType::OUT;
+            } else if(_pinType == "in_out") {
+                pinType = ui::PinType::IN_OUT;
+            } else {
+                errors.emplace_back(item.span, "unknown pin type '" + _pinType + "'");
+            }
+
+            displayItem.pin = ui::Pin(x, y, w, h, orientation, pinType);
         } else {
             errors.emplace_back(item.type.span, "unsupported display type");
         }
diff --git a/comdel/parser/astnode.h b/comdel/parser/astnode.h
index b0c8df8..54cd2be 100644
--- a/comdel/parser/astnode.h
+++ b/comdel/parser/astnode.h
@@ -2,6 +2,7 @@
 #define AST_NODE_H
 
 #include "token.h"
+#include "sourceerror.h"
 #include <optional>
 #include <vector>
 
@@ -173,6 +174,52 @@ struct DisplayItemNode: public AstNode
 {
     IdentifierNode type;
     std::vector<PropertyNode> values;
+
+    long long int asInt(std::vector<SourceError>* errors, const std::string& property, long long int _default = 0) {
+        for(auto& prop: values) {
+            if(prop.key.value == property) {
+                if(prop.value.is(ValueNode::INT)) {
+                    return prop.value.asInt();
+                } else {
+                    if(errors != nullptr) {
+                        errors->emplace_back(prop.value.span, "expected number");
+                    }
+                }
+            }
+        }
+        return _default;
+    }
+
+    std::string asIdentifier(std::vector<SourceError>* errors, const std::string& property, std::string _default = "") {
+        for(auto& prop: values) {
+            if(prop.key.value == property) {
+                if(prop.value.is(ValueNode::IDENTIFIER)) {
+                    return prop.value.asIdentifier();
+                } else {
+                    if(errors != nullptr) {
+                        errors->emplace_back(prop.value.span, "expected identifier");
+                    }
+                }
+            }
+        }
+        return _default;
+    }
+
+
+    std::string asString(std::vector<SourceError>* errors, const std::string& property, std::string _default = "") {
+        for(auto& prop: values) {
+            if(prop.key.value == property) {
+                if(prop.value.is(ValueNode::STRING)) {
+                    return prop.value.asString();
+                } else {
+                    if(errors != nullptr) {
+                        errors->emplace_back(prop.value.span, "expected string");
+                    }
+                }
+            }
+        }
+        return _default;
+    }
 };
 
 struct DisplayNode: public AstNode