Try setting up the section background of the sections holding your sliders. There's no way to automatically achieve that in LayerSider. If you're going to use an image background, it would be best that you use a light weight image so it will load fast. It's possible to do that using image compression. For more details, please see our performance guide.
Please also always include the URL of the page with issue in a the secure note so we could check directly rather than logging in and finding your page let alone digging through all your threads to find your domain name. This would help reduce our response time. I hope you understand.