ECHO ALL CUSTOM FIELDS

<?php
$custom_fields = get_post_custom();
 
foreach ( $custom_fields as $field_key => $field_values ) {
    foreach ( $field_values as $key => $value )
        echo $field_key . ' - ' . $value . '<br />';
}
?>
 
<?php echo get_post_meta( get_the_ID(), 'custom-field-slug', true ); ?>