In functions.php
<?php
add_editor_style();
if ( function_exists( 'add_theme_support' ) ) { // Added in 2.9
add_theme_support( 'post-thumbnails' );
add_image_size( 'thumb1', 72, 71, true );
}
function thumb1_image(){if ( has_post_thumbnail() ) {the_post_thumbnail( 'thumb1' );}}
?>