When you create a presentation that you are going to deliver yourself, it rarely matters if you have any content that is invisible to your audience — such invisible content may include your slide notes, comments, document properties — none of these are visible to your audience and you are free to add any information in these areas that will enable you to be better prepared to deliver your slides. However, if you need to share the same PowerPoint presentation with colleagues, or even publish it online, all unwritten rules about the invisible information change. Most users don’t even think twice about all this information simply because of the lack of awareness — but they should because most of this content may include hidden data or personal information that you may not be permitted to share by your company — or even want to share.
Learn how to use the Inspect Document feature in PowerPoint 2010 for Windows.

