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ReadingTypeEnum enumeration constants are used to describe the reading type of a text. A text on page can be written in horizontal lines, or vertical lines. 
typedef enum {
 TRT_Unknown,
 TRT_LinesBased,
 TRT_ColumnsBased
} ReadingTypeEnum;

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Elements

NameDescription
TRT\_ColumnsBasedThe text is written in vertical lines.
TRT\_LinesBasedThe text is written in horizontal lines.
TRT\_UnknownThe reading type is undefined. For a newly created text block, this constant means that text direction should be detected automatically.

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Used in

ITextOrientation::ReadingType