Header Image Help - Not fitting on screen

I decided go to back with your theme after finding out how to edit the margins and paddings to needs. Now the issue is getting the image to fix within the gray border on in the header. I tried resizing the images smaller without any such luck. How do I get it to fix on one page? Most pages using your theme seem to be using 1920 by 550 which does not even work when I tried it. Any help would be great.


Here is my site link:


First of all, please read theme documentation.

Custom Header is used for Logo and slider is completely different thing which is based on Posts and their respective featured images.