diff --git a/read_arduino.py b/read_arduino.py
index e568ecf..1921f63 100644
--- a/read_arduino.py
+++ b/read_arduino.py
@@ -63,7 +63,7 @@ def read():
             time.sleep(delay / 1000)
         exit(0)
     else:
-        controller = serial.Serial(port, baudrate=baud)
+        controller = serial.Serial(port, baudrate=baud)  # TODO: sometimes serial port is in use, make it promt user when it happens
         
     # open the file and add a line of header to it, then close
     f = open(file_name, "a", newline="", encoding="utf-8")
diff --git a/serial_plotter.py b/serial_plotter.py
index cfe68f0..765d58f 100644
--- a/serial_plotter.py
+++ b/serial_plotter.py
@@ -78,6 +78,7 @@ class SerialPlotter:
                     self.axs.plot(self.timeStamps[i], self.sensorsData[i], color=self.colors[i], 
                                   label=f'sensor {i + 1}, latest: {np.format_float_scientific(self.sensorsData[i][-1], precision = 2)} $\Omega$')
                     
+                    # TODO: make the font size an UI option from the settings.json
                     # Make the font size of values placed on x-axis and y-aixs equal to 16 (large enough)
                     plt.xticks(fontsize = 16)
                     plt.yticks(fontsize = 16)
diff --git a/test.py b/test.py
index d764216..42e56dc 100644
--- a/test.py
+++ b/test.py
@@ -70,6 +70,7 @@ def gen_settings(resistors, input_voltage, port, filename, window_size, delay):
     settings["winSize"] = window_size
     settings["file_name"] = filename
     settings["delay"] = delay
+    settings["font_size"] = frame.fontSize.GetValue()
     open(name, 'w').write(json.dumps(settings, indent=4))
     open(filename, "a", newline="", encoding="utf-8")