diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 7f566ea..5cf58cc 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -29,7 +29,7 @@ THERMOSTAT_PARAMETERS = [[
     {'name': 'Temperature PID', 'type': 'bool', 'value': False, 'commands': [f'pwm {ch} pid'], 'payload': ch,
      'children': [
          {'name': 'Set Temperature', 'type': 'float', 'value': 25, 'step': 0.1, 'limits': (-273, 300), 'siPrefix': True,
-          'suffix': '°C', 'commands': [f'pid {ch} target {{value}}']},
+          'suffix': '°C', 'commands': [f'pid {ch} target {{value}}'], 'payload': ch},
      ]},
     {'name': 'Output Config', 'expanded': False, 'type': 'group', 'children': [
         {'name': 'Max Current', 'type': 'float', 'value': 0, 'step': 0.1, 'limits': (0, 3), 'siPrefix': True,
@@ -158,6 +158,11 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self.ch1_t_plot = LiveLinePlot()
         self.ch1_i_plot = LiveLinePlot()
 
+        self.ch0_t_line = self.ch0_t_graph.getPlotItem().addLine(label='{value} °C')
+        self.ch0_t_line.setVisible(False)
+        self.ch1_t_line = self.ch1_t_graph.getPlotItem().addLine(label='{value} °C')
+        self.ch1_t_line.setVisible(False)
+
         self._set_up_graphs()
 
         self.ch0_t_connector = DataConnector(self.ch0_t_plot, max_points=self.DEFAULT_MAX_SAMPLES)
@@ -391,7 +396,13 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             if param.name() == 'Temperature PID' and not data:
                 ch = param.opts["payload"]
                 await self.tec_client.set_param('pwm', ch, 'i_set', params[ch].child('Constant Current').value())
+                line = getattr(self, f'ch{ch}_t_line')
+                line.setVisible(False)
             elif param.opts.get("commands", None) is not None:
+                if param.name() == 'Temperature PID':
+                    getattr(self, f'ch{param.opts["payload"]}_t_line').setVisible(True)
+                elif param.name() == 'Set Temperature':
+                    getattr(self, f'ch{param.opts["payload"]}_t_line').setValue(data)
                 await asyncio.gather(*[self.tec_client._command(x.format(value=data)) for x in param.opts["commands"]])
 
     def _set_param_tree(self):
@@ -409,6 +420,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
                 params[channel].child("PID Config", "Kd").setValue(settings["parameters"]["kd"])
                 if params[channel].child("Temperature PID").value():
                     params[channel].child("Temperature PID", "Set Temperature").setValue(settings["target"])
+                    getattr(self, f'ch{channel}_t_line').setValue(settings["target"])
 
     @pyqtSlot(list)
     def update_report(self, report_data):
@@ -416,6 +428,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             channel = settings["channel"]
             with QSignalBlocker(params[channel]):
                 params[channel].child("Temperature PID").setValue(settings["pid_engaged"])
+                getattr(self, f'ch{channel}_t_line').setVisible(settings["pid_engaged"])
                 if not settings["pid_engaged"]:
                     params[channel].child("Constant Current").setValue(settings["i_set"])