anchor.diff:      procedure Update_Label_Coordinates;
       procedure MapTypeChanged(aIsMultiplayer: Boolean);
   
  -    procedure UnRedoClick(Sender: TObject);
  -    procedure HistoryClick(Sender: TObject);
  -    procedure HistoryJumpTo(Sender: TObject);
  +    procedure UnRedo_Click(Sender: TObject);
  +    procedure History_Click(Sender: TObject);
  +    procedure History_JumpTo(Sender: TObject);
       procedure History_ListChange(Sender: TObject);
       procedure History_MouseWheel(Sender: TObject; WheelSteps: Integer; var aHandled: Boolean);
     protected
  
positive.code: end;
  
  
  procedure TKMapEdInterface.HistoryJumpTo(Sender: TObject);
  begin
    if ListBox_History.Selected then
      gGame.MapEditor.History.JumpTo(ListBox_History.ItemIndex);
  
negative.code: end;
  
  
  procedure TKMapEdInterface.UnRedo_Click(Sender: TObject);
  begin
    if (Sender = Button_Undo)
      or (Sender = Button_History_Undo) then
  