Field textarea to post html code and text

I put the textarea field to new post an html code field and text.

<textarea class=”expand70-200″ name=”posttext” id=”posttext” rows=”4″ cols=”60″></textarea>

<?php $settings = array( ‘textarea_name’ => ‘posttext’ );
wp_editor( $content, ‘posttext’ ); ?>

More in the edit field the post does not show the textarea field of html code and text

Does anyone know where I make this setting to also show in the edit of the post?

Thanks Daniel

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