private JMenu createHelpMenu() {
JMenu helpMenu = new JMenu("Help");
helpMenu.setMnemonic(KeyEvent.VK_H);
JMenuItem manualItem = new JMenuItem("Manual", KeyEvent.VK_M);
manualItem.addActionListener(new ManualHandler(this));
helpMenu.add(manualItem);
JMenuItem helpInfoItem = new JMenuItem("Help", KeyEvent.VK_H);
helpInfoItem.addActionListener(new HelpHandler(this));
helpMenu.add(helpInfoItem);
helpMenu.addSeparator();