Adding a seekbar to all slides at once

Hello,

How do I add a seekbar to all my slides in one instance?

I need to add a seekbar to all my slide and there are many. I know how to add it to a single slide but can't seem to find how to globally add it to project. 

Also, if there is a way to do this, would I be able to take the seekbar of a single slide after adding it to all?

Thank you,

Steven 

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