<?php

// First, enable thumbnails if they are not enabled yet
add_theme_support( \'post-thumbnails\' );

/*
 * Add image dimensions
 *
 * name
 * width
 * height
 * crop or resize (true or false)
 *
 * 99999 means very big number
 */
add_image_size( \'featured-portrait\'  , 200  , 99999, false );
add_image_size( \'featured-landscape\' , 99999, 200  , false );


// Next, choose names for these dimension sets
add_filter( \'image_size_names_choose\', \'my_custom_sizes\' );

function my_custom_sizes( $sizes ) {
    return array_merge( $sizes, array(
        \'featured-portrait\'  => __(\'Portrait, 200px wide\'),
        \'featured-landscape\' => __(\'Landscape, 200px high\'),
    ) );
}

See add_image_size() for more.