anchor.diff:    DoFileOpen_Ex(Ed, SFileName,
       true{AllowLoadHistory},
       false{AllowLoadHistoryEnc},
  +    false{AllowLoadBookmarks},
       false{AllowLexerDetect},
       false{AllowMsgBox},
       true{KeepScroll},
  
positive.code:     SplitHorz:= false;
      Splitted:= true;
      DoFileOpen_Ex(Ed2, AFileName2,
        AAllowLoadHistory,
        AAllowLoadHistory,
        AAllowLexerDetect,
  
negative.code: end;
  
  procedure TEditorFrame.DoFileOpen_Ex(Ed: TATSynEdit; const AFileName: string;
    AAllowLoadHistory, AAllowLoadHistoryEnc, AAllowLoadBookmarks, AAllowLexerDetect,
    AAllowErrorMsgBox, AKeepScroll, AAllowLoadUndo: boolean; AOpenMode: TAppOpenMode);
  begin
    try
  