-import jalview.analysis.AlignSeq;
-import jalview.commands.CommandI;
-import jalview.commands.EditCommand;
-import jalview.commands.EditCommand.Action;
-import jalview.datamodel.SequenceGroup;
-import jalview.datamodel.SequenceI;
-import jalview.jbgui.GSliderPanel;
-import jalview.util.MessageManager;
-