diff --git a/buttons.pde b/buttons.pde
deleted file mode 100644
index 525ddb1..0000000
--- a/buttons.pde
+++ /dev/null
@@ -1,78 +0,0 @@
-int buttonCount = 6;
-int i_buttonId;
-
-void initButtons() {
-  buttons[0] = new Button(10, 10, "Add Node");
-  buttons[1] = new Button(104, 10, "Delete Node");
-  buttons[2] = new Button(10, 50, "Dark/Bright Mode");
-  buttons[3] = new Button(10, 90, "Save");
-  buttons[4] = new Button(10, 130, "Open");
-  buttons[5] = new Button(10, 170, "Export Image");
-/*  buttons[0] = new Button(10, 10, "Node Hinzufügen");
-  buttons[1] = new Button(155, 10, "Löschen");
-  buttons[2] = new Button(10, 50, "Farben umkehren");
-  buttons[3] = new Button(10, 90, "Speichern");
-  buttons[4] = new Button(10, 130, "Öffnen");
-  buttons[5] = new Button(10, 170, "Bild Exportieren");*/
-}
-
-void buttonFunctions(int functionID) {
-  switch (functionID) {
-    case(0):
-    addNode(int(random(50, width-50)), int(random(30, height-150)), "");
-    i_selectedNode = nodeCount-1;
-    break;
-    case(1):
-    deleteSelectedNode();
-    break;
-    case(2):
-    darkMode = !darkMode;
-    break;
-    case(3):
-    saveCSV(dataPath("save.csv"));
-    selectOutput("Where to save .csv file to?", "saveCSVFile");
-    break;
-    case(4):
-    selectInput("Select csv File", "loadCSVFile");
-    break;
-    case(5):
-    selectOutput("Where to export .png image file to?", "savePNGFile");
-    break;
-  default:
-    break;
-  }
-}
-
-
-Button buttons[] = new Button[buttonCount];
-
-class Button {
-  int id, x, y, w, h;
-  String label;
-
-  boolean hover() {
-    return (mouseX > x && mouseX <  x+w && mouseY > y && mouseY < y+h) ? true : false;
-  }
-
-  void click() {
-    buttonFunctions(id);
-  }
-  Button(int x_, int y_, String label_) {
-    id = i_buttonId;
-    i_buttonId++;
-    x = x_;
-    y = y_ ;
-    label = label_;
-    w = int(textWidth(label))+18;
-    h = 32;
-  }
-
-  void display() {
-    stroke(0);
-    strokeWeight(1);
-    fill(255, 127);
-    rect(x, y, w, h, 4);
-    fill(0);
-    text(label, x+9, y+h/2+5);
-  }
-}
diff --git a/gui.pde b/gui.pde
index 4b9de3a..ed683a3 100644
--- a/gui.pde
+++ b/gui.pde
@@ -1,8 +1,14 @@
 int buttonCount = 8;
 int i_buttonId;
+boolean menuOpen = true;
+int[] menuButtons = {2, 3, 4, 5, 6};
 
-
-
+void menu() {
+  menuOpen = !menuOpen;
+  for (int i = 0; i < menuButtons.length; i++) {
+    buttons[menuButtons[i]].active = menuOpen;
+  }
+}
 
 void initButtons() {
   buttons[0] = new Button(72, 10, "Add Node");
@@ -13,6 +19,7 @@ void initButtons() {
   buttons[5] = new Button(10, 170, "Export Image");
   buttons[6] = new Button(10, 210, "Empty Workspace");
   buttons[7] = new Button(10, 10, "Menu");
+  menu();
   /*  buttons[0] = new Button(10, 10, "Node Hinzufügen");
    buttons[1] = new Button(155, 10, "Löschen");
    buttons[2] = new Button(10, 50, "Farben umkehren");
@@ -62,14 +69,16 @@ Button buttons[] = new Button[buttonCount];
 class Button {
   int id, x, y, w, h;
   String label;
+  boolean active;
 
   boolean hover() {
-    return (mouseX > x && mouseX <  x+w && mouseY > y && mouseY < y+h) ? true : false;
+    return (active) ? ((mouseX > x && mouseX <  x+w && mouseY > y && mouseY < y+h) ? true : false) : false;
   }
 
   void click() {
     buttonFunctions(id);
   }
+
   Button(int x_, int y_, String label_) {
     id = i_buttonId;
     i_buttonId++;
@@ -78,23 +87,17 @@ class Button {
     label = label_;
     w = int(textWidth(label))+18;
     h = 32;
+    active = true;
   }
 
   void display() {
-    stroke(0);
-    strokeWeight(1);
-    fill(255, 127);
-    rect(x, y, w, h, 4);
-    fill(0);
-    text(label, x+9, y+h/2+5);
+    if (active) {
+      stroke(0);
+      strokeWeight(1);
+      fill(255, 127);
+      rect(x, y, w, h, 4);
+      fill(0);
+      text(label, x+9, y+h/2+5);
+    }
   }
 }
-
-boolean menuOpen;
-
-void menu() {
-  if (menuOpen) {
-  } else {
-  }
-  menuOpen = !menuOpen;
-}
diff --git a/ontology.pde b/ontology.pde
index 41227fc..f9f76d1 100644
--- a/ontology.pde
+++ b/ontology.pde
@@ -57,13 +57,11 @@ void draw() {
     textAlign(CORNER);
     buttons[0].display();
     if (i_selectedNode != -1) buttons[1].display();
-    if (menuOpen) {
-      buttons[2].display();
-      buttons[3].display();
-      buttons[4].display();
-      buttons[5].display();
-      buttons[6].display();
-    }
+    buttons[2].display();
+    buttons[3].display();
+    buttons[4].display();
+    buttons[5].display();
+    buttons[6].display();
     buttons[7].display();
     rectMode(CENTER);
     textAlign(CENTER);