In PowerPoint, Publish means storing and managing slides in a shared location.
You can manage and reuse individual PowerPoint slides by storing them in a Slide Library on a server running Office SharePoint Server 2007 or Microsoft SharePoint Server 2010.
You and your colleagues that have access to the Slide Library can add slides to the library, insert slides from the library into a presentation, make changes to the slides in the library, track changes that have been made to a slide, and locate the latest version of a slide.
Important:
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To store, share, and reuse slides in a Slide Library, your computer must be running Microsoft Office PowerPoint 2007, PowerPoint 2010, or PowerPoint 2013, and it must be connected to a server running Office SharePoint Server 2007 or Microsoft SharePoint Server 2010. If you do not know whether your computer is connected to SharePoint Server, contact your server administrator.
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To add one or more slides from a different presentation file located on your computer or a network share, see Reuse slides from another presentation file.
Slide libraries were introduced in Microsoft Office 2007 to allow folks to share slides. Now Office has co-authoring features that serve as an alternative to slide libraries. If you want to share slides now, we recommend that you use the sharing and co-authoring features in PowerPoint to do so.
Slide libraries are a legacy feature of SharePoint. SharePoint 2016 can't make a slide library.
Do you miss the Slide Libraries that PowerPoint used to have?
If this is a feature you’d like to revive, please send us your feedback to help us prioritize new features in future updates. See How do I give feedback on Microsoft Office? for more information.