The question is a bit vague, isn't it ? First, you need PDFToMusic Pro. There is no Expert Mode in the lighter version. Then, you do Settings>Expert Mode. There are plenty of tabs with sliders that can allow you to change many parameters. I would advise you to be very careful when changing one -or several- of them. It is better to change as few as possible at one time and drift very lightly from the "factory" settings. Anyway, there is a button to set one or all the tabs to the factory settings. For my part, I should say that the default settings do great job.
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Harmony Assistant - Ubuntu + Wine et Windows XP sur machine virtuelle. VS, OMeR, PDF2M
Thanks for your answer. I want to know if is possible to use Expert Mode in the lighter version. I had been read a subject in the PDFtoMusic manual about Expert Mode and I thought it 's possible.