How to functionality such as Play/Pause, replay, Next/Prev, should be customized (Recommend to use master slide).

Hello Velu,

Thanks for sharing that you would like to customize your navigation. I took a look at the .story file that you shared, but I do not see any triggers associated with the items you've added to the master slide.

You will need an associated trigger on each item. For many of the player items, such as play/pause seekbar, replay slide, and volume, are not included as individual triggers.

I'm curious if you've explored all of the items within the built-in player?

Storyline 360: Working with the Player

I look forward to others chiming in to help you with your custom design if you decide to go this route.