anchor.diff:  
     FOptShowScrollArrows:= true;
     FOptShowScrollMark:= true;
  +  FOptShowDropMark:= true;
     FOptShowXButtons:= tbShowAll;
     FOptShowPlusTab:= true;
     FOptShowPlusText:= ' + ';
  
positive.code:     property OptShowAtBottom: boolean read FOptShowAtBottom write FOptShowAtBottom;
      property OptShowScrollArrows: boolean read FOptShowScrollArrows write FOptShowScrollArrows;
      property OptShowScrollMark: boolean read FOptShowScrollMark write FOptShowScrollMark;
      property OptShowXButtons: TATTabShowClose read FOptShowXButtons write FOptShowXButtons;
      property OptShowPlusTab: boolean read FOptShowPlusTab write FOptShowPlusTab;
      property OptShowPlusText: atString read FOptShowPlusText write FOptShowPlusText;
  
negative.code:     FScrollPos: integer;
      FImages: TImageList;
      FBitmap: TBitmap;
  
      //events    
      FOnTabClick: TNotifyEvent;
      FOnTabPlusClick: TNotifyEvent;
      FOnTabClose: TATTabCloseEvent;
  