highlight any text you want to save as audio file, and start the 'convert text to audio books' feature

without highlight any text, all text from the document is output to the audio files.

you still able to edit the text in the preview area

select text to speech engine, adjust the speak rate, select the output format, wave , mp3 or mp4

press 'start now' to start the processing text to audio file

If you use English text to speech engine to process Mandarin text, the output file maybe only got few english sound if the article content english text.

Some text to speech engine have sentence/text lenght limitation. Always test read the article in the RichText Editor for better output result.