You can also export to the new .mmx format. When you EXPORT, your document is scanned for hidden elements, and you are presented with an alert telling you how many hidden notes and outline elements there are, and presented with the option to include or exclude those hidden elements:
We present this option because you might be exporting your script to .mmx in order to provide the file to a production-related system. In that case, your private notes and non-printing outline elements might not be relevant, and might even contain confidential notes you don't wish anyone else to see.