diff --git a/src/dev/kske/minesweeper/CustomDialog.java b/src/dev/kske/minesweeper/CustomDialog.java
index e2df3cc..4c7fe92 100644
--- a/src/dev/kske/minesweeper/CustomDialog.java
+++ b/src/dev/kske/minesweeper/CustomDialog.java
@@ -2,10 +2,15 @@ package dev.kske.minesweeper;
 
 import java.awt.BorderLayout;
 import java.awt.FlowLayout;
+import java.awt.Font;
+import java.awt.Frame;
+import java.awt.GridLayout;
 
 import javax.swing.JButton;
 import javax.swing.JDialog;
+import javax.swing.JLabel;
 import javax.swing.JPanel;
+import javax.swing.JSlider;
 import javax.swing.border.EmptyBorder;
 
 
@@ -20,34 +25,72 @@ public class CustomDialog extends JDialog {
 	private static final long	serialVersionUID	= -4019516811065781434L;
 	private final JPanel mcontentPanel = new JPanel();
 
-	/**
-	 * Launch the application.
-	 */
-	public static void main(String[] args) {
-		try {
-			CustomDialog dialog = new CustomDialog();
-			dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
-			dialog.setVisible(true);
-		} catch (Exception e) {
-			e.printStackTrace();
-		}
-	}
-
 	/**
 	 * Create the dialog.
 	 */
-	public CustomDialog() {
+	public CustomDialog(Frame owner) {
+		super(owner, ModalityType.APPLICATION_MODAL);
+		setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
+
 		setBounds(100, 100, 450, 300);
 		getContentPane().setLayout(new BorderLayout());
-		mcontentPanel.setLayout(new FlowLayout());
 		mcontentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
 		getContentPane().add(mcontentPanel, BorderLayout.CENTER);
+		mcontentPanel.setLayout(new GridLayout(0, 3, 0, 0));
+		{
+			JLabel lblBoardWidth = new JLabel("Board Width:");
+			lblBoardWidth.setFont(new Font("Tahoma", Font.PLAIN, 14));
+			mcontentPanel.add(lblBoardWidth);
+		}
+		{
+			JSlider sliderBoardWidth = new JSlider();
+			sliderBoardWidth.setValue(16);
+			sliderBoardWidth.setMinimum(2);
+			sliderBoardWidth.setMaximum(30);
+			mcontentPanel.add(sliderBoardWidth);
+		}
+		{
+			JLabel label = new JLabel("");
+			mcontentPanel.add(label);
+		}
+		{
+			JLabel lblBoardHeight = new JLabel("Board Height:");
+			lblBoardHeight.setFont(new Font("Tahoma", Font.PLAIN, 14));
+			mcontentPanel.add(lblBoardHeight);
+		}
+		{
+			JSlider sliderBoardHeight = new JSlider();
+			sliderBoardHeight.setValue(16);
+			sliderBoardHeight.setMaximum(30);
+			sliderBoardHeight.setMinimum(2);
+			mcontentPanel.add(sliderBoardHeight);
+		}
+		{
+			JLabel label = new JLabel("");
+			mcontentPanel.add(label);
+		}
+		{
+			JLabel lblNumberOfMines = new JLabel("Number of Mines:");
+			lblNumberOfMines.setFont(new Font("Tahoma", Font.PLAIN, 14));
+			mcontentPanel.add(lblNumberOfMines);
+		}
+		{
+			JSlider slider = new JSlider();
+			slider.setValue(16);
+			slider.setMinimum(2);
+			slider.setMaximum(200);
+			mcontentPanel.add(slider);
+		}
+		{
+			JLabel label = new JLabel("");
+			mcontentPanel.add(label);
+		}
 		{
 			JPanel buttonPane = new JPanel();
 			buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
 			getContentPane().add(buttonPane, BorderLayout.SOUTH);
 			{
-				JButton okButton = new JButton("OK");
+				JButton okButton = new JButton("Start Game");
 				okButton.setActionCommand("OK");
 				buttonPane.add(okButton);
 				getRootPane().setDefaultButton(okButton);
@@ -58,6 +101,7 @@ public class CustomDialog extends JDialog {
 				buttonPane.add(cancelButton);
 			}
 		}
+		setVisible(true);
 	}
 
 }
diff --git a/src/dev/kske/minesweeper/Minesweeper.java b/src/dev/kske/minesweeper/Minesweeper.java
index 8f30a5a..e319e83 100644
--- a/src/dev/kske/minesweeper/Minesweeper.java
+++ b/src/dev/kske/minesweeper/Minesweeper.java
@@ -14,6 +14,7 @@ import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.SwingConstants;
+import javax.swing.UIManager;
 
 /**
  * Project: <strong>Minesweeper</strong><br>
@@ -59,6 +60,12 @@ public class Minesweeper {
 	 * Initialize the contents of the frame.
 	 */
 	private void initialize() {
+		try {
+			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+		} catch (Exception ex) {
+			ex.printStackTrace();
+		}
+
 		mframe = new JFrame();
 		mframe.setResizable(false);
 		mframe.setTitle("Minesweeper");
@@ -127,6 +134,10 @@ public class Minesweeper {
 		easyMenuItem.addActionListener((evt) -> initGame(easyConfig));
 		mediumMenuItem.addActionListener((evt) -> initGame(mediumConfig));
 		hardMenuItem.addActionListener((evt) -> initGame(hardConfig));
+		customMenuItem.addActionListener((evt) -> {
+			var dlg = new CustomDialog(mframe);
+
+		});
 		aboutMenuItem.addActionListener((evt) -> {
 			JOptionPane.showMessageDialog(board, "Minesweeper version " + VERSION + "\nby Kai S. K. Engelbart");
 		});