@bastienchill: Hello Bastien,
Go to => Child Theme Folder => functions.php and add the following Code.
function bold_photography_archive_image() {
if ( ! has_post_thumbnail() ) {
// Bail if there is no featured image.
return;
}
$archive_layout = get_theme_mod( 'bold_photography_content_layout', 'excerpt' );
if ( 'full-content' === $archive_layout ) {
// Bail if full content is selected.
return;
}
bold_photography_post_thumbnail( array(666,666) );
}
Now replace 666,666 in the array with the size you want the images in the archive to be.
Let me know if t his works out!
Kind Regards,
Skandha