WordPress TinyMCE customization filter

gistfile1.txt

function dbt_customize_tinymce_editor( $in ) {
        $in['block_formats']	= __( 'Heading 2' ) . '=h2;' . __( 'Heading 3' ) . '=h3;' . __( 'Paragraph' ) . '=p;';
          
	$in['toolbar1'] 		= 'formatselect,bold,italic,underline,bullist,numlist,blockquote,link,unlink,pastetext';
        $in['toolbar2'] 		= '';
        $in['toolbar3'] 		= '';
        $in['toolbar4'] 		= '';

	$in['object_resizing']  	= false; // Disable image re-sizing
	$in['paste_as_text'] 	        = true; // Turn paste as plain text on by default

        return $in;
}
add_filter( 'tiny_mce_before_init', 'dbt_customize_tinymce_editor' );