Indicates whether to use multiple threads during the conversion.
true to use multiple threads during the conversion; otherwise, false. Default value is true.
When the value of UseThreads is true, the converter will use multiple thread to speed up the conversion process. The number of threads is determined automatically from the number of CPU cores and current system load.
If OCR conversion is used, then setting UseThreads to true will automatically uses threads inside the OCR engine if needed regardless of the OCR engine settings.