i have also that Problem on my Website.

Can you help pls, because it is very important for the website to fix the header.

Thank you in advance

You can check this guide about changing the height of the header: https://docs.themeisle.com/article/872-how-to-increase-post-page-header-height-in-hestia that will make more of the image visible.

Another way is to cut your images before applying to the header so they fit the container well or change the background-position using CSS: https://developer.mozilla.org/en-US/docs/Web/CSS/background-position

I hope that helps!