diff --git a/src/portcontrol.h b/src/portcontrol.h
--- a/src/portcontrol.h
+++ b/src/portcontrol.h
@@ -1,5 +1,5 @@
 /*
-  Copyright © 2017 Hasan Yavuz Özderya
+  Copyright © 2019 Hasan Yavuz Özderya
 
   This file is part of serialplot.
 
@@ -47,6 +47,12 @@ public:
     QSerialPort* serialPort;
     QToolBar* toolBar();
 
+    void selectPort(QString portName);
+    void selectBaudrate(QString baudRate);
+    void openPort();
+    /// Returns maximum bit rate for current baud rate
+    unsigned maxBitRate() const;
+
     /// Stores port settings into a `QSettings`
     void saveSettings(QSettings* settings);
     /// Loads port settings from a `QSettings`. If open serial port is closed.
@@ -76,19 +82,18 @@ private:
     /// Returns currently selected flow control as text to be saved in settings
     QString currentFlowControlText();
 
-public slots:
+private slots:
     void loadPortList();
     void loadBaudRateList();
     void togglePort();
-    void selectPort(QString portName);
+    void selectListedPort(QString portName);
 
-    void selectBaudRate(QString baudRate);
+    void _selectBaudRate(QString baudRate);
     void selectParity(int parity); // parity must be one of QSerialPort::Parity
     void selectDataBits(int dataBits); // bits must be one of QSerialPort::DataBits
     void selectStopBits(int stopBits); // stopBits must be one of QSerialPort::StopBits
     void selectFlowControl(int flowControl); // flowControl must be one of QSerialPort::FlowControl
 
-private slots:
     void openActionTriggered(bool checked);
     void onCbPortListActivated(int index);
     void onTbPortListActivated(int index);