image size magazine

Hi dear Kriesi-team,

I would like to change the image size of the magazine settings to 546×734

Unfortunately in settings->media I have only three options: https://imgur.com/KaAvdBa which I already use.

Where can I change the rest of the settings like the magazine one?

I found this two codes but unfortunately, I don´t know which one to use

function avia_change_image_size_array() {
global $avia_config;
$avia_config[‘imgSize’][‘page’] = array(‘width’=>620, ‘height’=>200);
}
add_action( ‘init’, ‘avia_change_image_size_array’);

add_filter( ‘avf_modify_thumb_size’, ‘enfold_customization_modify_thumb_size’, 10, 1 );
function enfold_customization_modify_thumb_size( $size ) {
$size[‘entry_with_sidebar’] = array(‘width’=>300, ‘height’=>300);
return $size;
}

Thank you very much

best,
Veronika