change the master slide for a slide library in sharepoint

I have a slide library and I need to change the master slide for all of the slides in the slide library.  How can I do that?
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Brad HoweDevOps ManagerCommented:

You will have to pull them all down to your machine update the master and re-publish it to your sharepoint site.

"When you publish a presentation to a slide library, the slides upload as individual files, so they can be modified and tracked independently. The library maintains a link to the presentation, so that you are notified when slides change. "

Apply a slide master to slides that you imported from a Slide Library

Eagleeye55Author Commented:
When I pulll them down and do the master slide change and then try to put them up the Publish slides is grayed out.  I cannot find how to push the backup at one time and I don't want to have to do each slide individually.  Is there a way to do them all at once?
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