Disable h1 and h2 from rich text editor combobox

In the WordPress control panel, when writing a new post, I would like to disable the Header 1 and Header 2 from the text formatting combobox, because I already use them on my theme (h1 for blog name and h2 for post titles), and would like to keep all headers inside a post with h3 or higher. Is that possible?

It doesn’t matter for the case if the code can be edited in the HTML view. Also, I don’t want to edit WordPress internal files, so a hack for functions.php or a plugin would be great for this task, in order to preserve this change across future updates.

Thank you!

2 s
2

you can change lots of things about the tinyMCE editor at the tiny_mce_before_init filter.

http://codex.wordpress.org/TinyMCE_Custom_Buttons

the following will restrict your blockformats to p,h3,h4 and blockquote

function wpa_45815($arr){
    $arr['theme_advanced_blockformats'] = 'p,h3,h4,blockquote';
    return $arr;
  }
add_filter('tiny_mce_before_init', 'wpa_45815');

EDIT for WordPress 3.9 see link

function wpa_45815($arr){
    $arr['block_formats'] = 'Paragraph=p;Heading 3=h3;Heading 4=h4';
    return $arr;
  }
add_filter('tiny_mce_before_init', 'wpa_45815');

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