diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 05913bc..16f6b7d 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -203,6 +203,24 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self.menu.addAction(clear)
         self.menu.clear = clear
 
+        self.samples_spinbox = QtWidgets.QSpinBox()
+        self.samples_spinbox.setRange(2, 100000)
+        self.samples_spinbox.setSuffix(' samples')
+        self.samples_spinbox.setValue(self.max_samples)
+        self.samples_spinbox.valueChanged.connect(self.set_max_samples)
+
+        limit_samples = QtWidgets.QWidgetAction(self.menu)
+        limit_samples.setDefaultWidget(self.samples_spinbox)
+        self.menu.addAction(limit_samples)
+        self.menu.limit_samples = limit_samples
+
+    @pyqtSlot(int)
+    def set_max_samples(self, samples: int):
+        self.ch0_t_connector.max_points = samples
+        self.ch0_i_connector.max_points = samples
+        self.ch1_t_connector.max_points = samples
+        self.ch1_i_connector.max_points = samples
+
     def _set_up_graphs(self):
         for graph in self.ch0_t_graph, self.ch0_i_graph, self.ch1_t_graph, self.ch1_i_graph:
             time_axis = LiveAxis('bottom', text="Time since Thermostat reset", **{Axis.TICK_FORMAT: Axis.DURATION})