Changing header image size

[beluga]

I am working with a Wordpress theme. Originally the Wordpress theme had a 800 x 400 pixel recommendation for the header image. I went into the themes functions file and made it 1000 x 1000. pixels to fit my image so I didn't. have to crop it. Now it doesn't make me crop it when I go to customize it but after uploading it still seems to stretch it to 800 x 400 size and the image looks funny. Is there something else that needs to be changed?

 

[Moorcam]

You can add this to your functions.php file:

I am working with a Wordpress theme. Originally the Wordpress theme had a 800 x 400 pixel recommendation for the header image. I went into the themes functions file and made it 1000 x 1000. pixels to fit my image so I didn't. have to crop it. Now it doesn't make me crop it when I go to customize it but after uploading it still seems to stretch it to 800 x 400 size and the image looks funny. Is there something else that needs to be changed?

Add this to your functions.php file:

add_image_size('custom-header', 1000, 1000, true);

You should also check if the theme has any hardcoded image sizes in the CSS or template files.