-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
-import javax.swing.event.*;
-
-import jalview.datamodel.*;
-import jalview.io.*;
+import jalview.datamodel.Alignment;
+import jalview.io.FormatAdapter;
+import jalview.util.MessageManager;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.GridLayout;
+import java.awt.Insets;
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.SwingConstants;
+import javax.swing.SwingUtilities;
+import javax.swing.event.CaretEvent;
+import javax.swing.event.CaretListener;