We've been wondering about how we could hide specific sections of a document when we save it. The reason is that we have one technical specification document that serves for us and for the client. For the client, one specific section would be nice to be removed. We do not want to maintain two documents. We also do not want to add an addendum in reference to a secondary document, as we would have to maintain an additional small document and the client will still see a broken reference.

Any idea on how you handle such situation?