Presenter Functionality in storyline

I have a presenter file sent to me from a client which locks the use of the seek bar and next button until the timeline ends. But once the user reaches the end of the timeline, the next button and seek bar are available on those slides anytime you return to them. Sort of locking the seek bar and next button.

Am I missing an easy way to do this in storyline or do I have to place a script on every slide to disable the button and bar until timeline ends.

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