Automatic crop of a picture from a post to use these as header

Hi @Markus,
Can you go to Appearance=> Customize=> Header Image and under Page/Post Featured Image Size select Full Width Slider Image. This should keep the image size of the page post featured image as header image.

Let me know how it works.

Regards,
Pratik

Hi @Markus,

If that is the case, then you need to do a bit of customization via child theme. For that , first Create a child theme. Details for child theme are here.

Then in your child theme’s functions.php add the following codes.

function catchflames_child_manage_image_size() {
    remove_image_size( 'featured-slider-full' );
    add_image_size( 'featured-slider-full', 1600, 400, true );
}
add_action( 'init', 'catchflames_child_manage_image_size' );

Then use Regenerate Thumbnails plugin once to generate thubmnails. You can visit this link for the plugin: https://wordpress.org/plugins/regenerate-thumbnails/

Regards,
Pratik