Nelu

Me too 🙂 Does anyone know how to do this?

I agree. That would be extremely useful.

Nevermind.

I figured it out:

add_action('admin_print_styles-edit.php','increase_textarea_css');
add_action('admin_print_styles-post-new.php','increase_textarea_css');

function increase_textarea_css() {
	?>
	<style type="text/css">
	<?php if (($_GET['post_type'] == 'my_custom_post_type') || ($post_type == 'my_custom_post_type')) : ?>
	textarea#content { height:600px!important; }
	<?php endif; ?>
	</style>
	<?php
}