PenciDesign replied
Hi,
As I see you're using wrapper section for slider is Boxed. Please edit that page by use Elementor > change it to Full Width > and on "Column Gap" select "No Gap"
For add overlay background for Penci Slider on Elementor, yeah, currently we didn't support for enable it on Penci Slider element on Elementor. We will add more this in the next update version of Soledad
Please wait for it.
Best Regards,
PenciDesign