By default the converter will not generate bookmarks for the tags that don't have a text (e.g IMG tag).
Setting this property true will instruct the converter to use the DefaultTitle or the tag outer HTML as
bookmark title. The default value is false and therefore the converter will ignore the bookmarks for which a title
cannot be automatically determined.
Note: This is used only by the IE rendering engine.

C# | Visual Basic | Visual C++ |
public bool AllowDefaultTitle { get; set; }
Public Property AllowDefaultTitle As Boolean Get Set
public: property bool AllowDefaultTitle { bool get (); void set (bool value); }

Assembly: ExpertPdf.HtmlToPdf (Module: ExpertPdf.HtmlToPdf.dll) Version: 9.2.0.25824 (9.2.0.0)