WordPress inserted images settings filters

gistfile1.txt

function dbt_default_inserted_image_link_type() {
        return 'none'; // also 'file' (default), 'post', 'custom'
}
add_filter( 'pre_option_image_default_link_type', 'dbt_default_inserted_image_link_type' );

function dbt_default_inserted_image_size() {
        return 'medium'; // also 'thumbnail' (default), 'large', 'full'
}
add_filter( 'pre_option_image_default_size', 'dbt_default_inserted_image_size' );

function dbt_default_inserted_image_alignment() {
        return 'none'; // also 'left', 'right'
}
add_filter( 'pre_option_image_default_align', 'dbt_default_inserted_image_alignment' );