How to add  to the header I'm attempting to figure out a way to add 

&lt;meta http-equiv="X-UA-Compatible" content="IE=edge"&gt; 


to the header of my pages. I've heard that you could add it in your theme settings but I could not find where that would be located. I also heard you can resolve the issue using template.php in your theme. I've added

&lt;?php
function retheme_alpha_0_2_preprocess_html(&amp;$head_elements) {
    $element = array(
        '#type' =&gt; 'html_tag',
        '#tag' =&gt; 'meta',
        '#attributes' =&gt; array('http-equiv' =&gt; 'X-UA-Compatible', 'content' =&gt; 'IE=edge,chrome=1'),
        );
    drupal_add_html_head($element, 'chrome_frame');
}


to mytheme/templates/template.php

However it seems to have no effect.
Try this, it works for me, I just tested. I don't think you need #type and http-equiv needs to match in the html head call. 

/**
 * Implements template_preprocess_html().
 *
 */
function mytheme_preprocess_html(&amp;$vars) {

    $element = array(
        '#tag' =&gt; 'meta',
        '#attributes' =&gt; array(
          'http-equiv' =&gt; 'X-UA-Compatible',
          'content' =&gt; 'IE=edge,chrome=1'
        ),
      );
      drupal_add_html_head($element, 'http_equiv');

}


Beyond that, if it does not work, then you have some other issue. Be sure to clear all caches.