Hello su

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Best regards

Okey!

Thanks for the access. I have checked the test page first slideshow. It is working fine. I have tested with Protostar template. Your template container width is smaller. Please check your template settings or contact your template provider for support.

sorry, it works incorrect. what I need is "force" full width, which means the images or slides will expand to full screen mode as the screenshot:https://imgur.com/Ymg6vXN. But it just fixed inside the container width right now. any solution?

This is what I am talking about. This container is from your tremplate. Please look at my screenshot on Helix Ultimate template:

https://prnt.sc/gbifK5-GGrWx