Hey Dikla

Thank you for posting in the Lucid Community 🥳 While it is not possible to have hidden comments or notes on an exported PDF it is possible to have view only notes on a Published version of the document. If you navigate to File > Publish > Full Document URL that is where this is possible. 

I can see how this functionality would be very useful for yourself and others in the future--would you care to throw a request in here for our devs to have a look at? We are always looking for ways to improve and feedback like yours is the best way for us to do so. 

Thank you for the heads up on this and for giving us the opportunity to help your workflow in the future--firm handshakes