+import jalview.analysis.Conservation;
+import jalview.analysis.TreeModel;
+import jalview.api.AlignViewportI;
+import jalview.datamodel.Sequence;
+import jalview.datamodel.SequenceGroup;
+import jalview.datamodel.SequenceI;
+import jalview.datamodel.SequenceNode;
+import jalview.schemes.ColourSchemeI;
+import jalview.schemes.ColourSchemeProperty;
+import jalview.schemes.UserColourScheme;
+import jalview.structure.SelectionSource;
+import jalview.util.Format;
+import jalview.util.MappingUtils;
+import jalview.util.MessageManager;
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.RenderingHints;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+import java.awt.print.PageFormat;
+import java.awt.print.Printable;
+import java.awt.print.PrinterException;
+import java.awt.print.PrinterJob;
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.Vector;
+
+import javax.swing.JColorChooser;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.SwingUtilities;
+import javax.swing.ToolTipManager;