anchor.diff:  
         TempCaption:=
           Format(FOptShowNumberPrefix, [i+1]) +
  -        FOptShowModifiedText +
  +        IfThen(Data.TabModified, FOptShowModifiedText) +
           Data.TabCaption;
   
         UpdateCaptionProps(C, TempCaption, NLineHeight, Extent);
  
positive.code:   _InitOptSpaceSide = 10;
    _InitOptSpaceInitial = 5;
    _InitOptSpaceBeforeText = 6;
    _InitOptSpaceBetweenTabs = 0;
    _InitOptSpaceBetweenLines = 4;
    _InitOptSpaceBetweenIconCaption = 0;
  
negative.code:   FOptSpaceSide:= _InitOptSpaceSide;
    FOptSpaceInitial:= _InitOptSpaceInitial;
    FOptSpaceBeforeText:= _InitOptSpaceBeforeText;
    FOptSpaceBeforeTextForMinWidth:= _InitOptSpaceBeforeTextForMinWidth;
    FOptSpaceBetweenTabs:= _InitOptSpaceBetweenTabs;
    FOptSpaceBetweenLines:= _InitOptSpaceBetweenLines;
    FOptSpaceBetweenIconCaption:= _InitOptSpaceBetweenIconCaption;
  