If you want to use the image as it is without cropping, you need to add a custom header height and width function in your child theme’s functions.php file.
function graphene_custom_header_width(){
return 1000;
}
function graphene_custom_header_height(){
return 200;
}
add_filter('graphene_header_image_width', 'graphene_custom_header_width');
add_filter('graphene_header_image_height', 'graphene_custom_header_height');
(Change height and width to reflect your header image dimension.)
And this to custom CSS.
#header {
height: 200px;
width: 1000px;
}
