+import java.awt.AlphaComposite;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.Rectangle;
+import java.awt.RenderingHints;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.AdjustmentEvent;
+import java.awt.event.AdjustmentListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+import java.awt.event.MouseWheelEvent;
+import java.awt.event.MouseWheelListener;
+import java.awt.image.BufferedImage;
+import java.beans.PropertyChangeEvent;
+import java.util.ArrayList;
+import java.util.BitSet;
+import java.util.Collections;
+import java.util.List;
+
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
+import javax.swing.Scrollable;
+import javax.swing.ToolTipManager;
+
+import jalview.api.AlignViewportI;
+import jalview.datamodel.AlignmentAnnotation;
+import jalview.datamodel.AlignmentI;
+import jalview.datamodel.Annotation;
+import jalview.datamodel.ColumnSelection;
+import jalview.datamodel.ContactListI;
+import jalview.datamodel.ContactMatrixI;
+import jalview.datamodel.ContactRange;
+import jalview.datamodel.GraphLine;
+import jalview.datamodel.HiddenColumns;
+import jalview.datamodel.SequenceI;
+import jalview.gui.JalviewColourChooser.ColourChooserListener;
+import jalview.renderer.AnnotationRenderer;
+import jalview.renderer.AwtRenderPanelI;
+import jalview.renderer.ContactGeometry;
+import jalview.schemes.ResidueProperties;
+import jalview.util.Comparison;
+import jalview.util.Format;
+import jalview.util.MessageManager;
+import jalview.util.Platform;
+import jalview.viewmodel.ViewportListenerI;
+import jalview.viewmodel.ViewportRanges;
+import jalview.ws.datamodel.MappableContactMatrixI;
+import jalview.ws.datamodel.alphafold.PAEContactMatrix;