-import java.util.*;
-
-import java.awt.*;
-import java.awt.event.*;
-
-import jalview.datamodel.*;
-import jalview.schemes.*;
-import java.awt.Rectangle;
+import jalview.api.FeatureColourI;
+import jalview.datamodel.GraphLine;
+import jalview.schemes.AnnotationColourGradient;
+import jalview.schemes.FeatureColour;
+import jalview.util.MessageManager;
+
+import java.awt.Checkbox;
+import java.awt.Choice;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.Font;
+import java.awt.Frame;
+import java.awt.GridLayout;
+import java.awt.Label;
+import java.awt.Panel;
+import java.awt.Scrollbar;
+import java.awt.TextField;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.AdjustmentEvent;
+import java.awt.event.AdjustmentListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;