diff --git a/interactive.py b/interactive.py
index 42e07f9..f6889bb 100644
--- a/interactive.py
+++ b/interactive.py
@@ -408,11 +408,11 @@ class Moulder(FigureCanvasQTAgg):
         # self._update_data()
         self._update_data_plot()
 
-    def _key_press_callback(self, event_key):
+    def keyPressEvent(self, event):
         """
         What to do when a key is pressed on the keyboard.
         """
-        if event_key == 'd':
+        if event.key() == Qt.Key_D:
             if self._drawing and self._xy:
                 self._xy.pop()
                 if self._xy:
@@ -447,7 +447,7 @@ class Moulder(FigureCanvasQTAgg):
                 self.canvas.draw()
                 # self._update_data()
                 self._update_data_plot()
-        elif event_key == 'n':
+        elif event.key() == Qt.Key_N:
             self._ivert = None
             self._ipoly = None
             for line, poly in zip(self.lines, self.polygons):
@@ -465,7 +465,7 @@ class Moulder(FigureCanvasQTAgg):
                 'left click: set vertice', 'right click: finish',
                 'esc: cancel']))
             self.canvas.draw()
-        elif event_key == 'escape':
+        elif event.key() == Qt.Key_Escape:
             if self._add_vertex:
                 self._add_vertex = False
             else:
@@ -480,11 +480,11 @@ class Moulder(FigureCanvasQTAgg):
                     line.set_animated(False)
                     line.set_color([0, 0, 0, 0])
             self.canvas.draw()
-        elif event_key == 'r':
+        elif event.key() == Qt.Key_R:
             self.modelax.set_xlim(self.x.min(), self.x.max())
-            self.modelax.set_ylim(self.min_depth, self.max_depth)
+            self.modelax.set_ylim(self.max_depth, self.min_depth)
             self._update_data_plot()
-        elif event_key == 'a':
+        elif event.key() == Qt.Key_A:
             self._add_vertex = not self._add_vertex
 
     def _mouse_move_callback(self, event):
diff --git a/moulder.py b/moulder.py
index f3cb51e..7b864d9 100644
--- a/moulder.py
+++ b/moulder.py
@@ -36,14 +36,15 @@ class MoulderApp(QMainWindow):
                                density_range=DENSITY_RANGE,
                                width=5, height=4, dpi=100)
         self.setCentralWidget(self.moulder)
+        self.moulder.setFocusPolicy(Qt.StrongFocus)
         self.set_callbacks()
 
-    def keyPressEvent(self, event):
-        keys_dict = {Qt.Key_N: "n", Qt.Key_R: "r",
-                     Qt.Key_A: "a", Qt.Key_D: "d",
-                     Qt.Key_Escape: "escape"}
-        if event.key() in keys_dict.keys():
-            self.moulder._key_press_callback(keys_dict[event.key()])
+    # def keyPressEvent(self, event):
+    #     keys_dict = {Qt.Key_N: "n", Qt.Key_R: "r",
+    #                  Qt.Key_A: "a", Qt.Key_D: "d",
+    #                  Qt.Key_Escape: "escape"}
+    #     if event.key() in keys_dict.keys():
+    #         self.moulder._key_press_callback(keys_dict[event.key()])
 
     def closeEvent(self, event):
         event.ignore()