anchor.diff:      property OptShowAtBottom: boolean read FOptShowAtBottom write FOptShowAtBottom;
       property OptShowScrollArrows: boolean read FOptShowScrollArrows write FOptShowScrollArrows;
       property OptShowScrollMark: boolean read FOptShowScrollMark write FOptShowScrollMark;
  +    property OptShowDropMark: boolean read FOptShowDropMark write FOptShowDropMark;
       property OptShowXButtons: TATTabShowClose read FOptShowXButtons write FOptShowXButtons;
       property OptShowPlusTab: boolean read FOptShowPlusTab write FOptShowPlusTab;
       property OptShowPlusText: atString read FOptShowPlusText write FOptShowPlusText;
  
positive.code:   FOptShowArrowMenu:= true;
    FOptShowBorderActiveLow:= false;
    FOptShowEntireColor:= false;
    FOptMouseMiddleClickClose:= true;
    FOptMouseDoubleClickClose:= true;
    FOptMouseDoubleClickPlus:= false;
  
negative.code: 
    FOptShowScrollArrows:= true;
    FOptShowScrollMark:= true;
    FOptShowDropMark:= true;
    FOptShowXButtons:= tbShowAll;
    FOptShowPlusTab:= true;
    FOptShowPlusText:= ' + ';
  