The xMark theme comes coded with this for you - All you need to do is add your Google Adsense code and you’re done! If you don’t add the code, nothing will show, so - for you WordPress MU users out there, you can still use this theme and the optional adsense code will not affect the template output at all.

To add your code, look in the Main Index template (index.php) and find this code:

<!--ADD YOUR YOUR ADSENSE CODE HERE-->
<!--replace this line with your code-->
<!--END ADSENSE-->

See that line in the middle? This one:

<!--replace this line with your code-->

Remove JUST that line and replace it with your Adsense code. Don’t forget to hit the ‘Update File’ button at the bottom so your changes are made. That’s it - nothing to it, right?

This will display your Google Adsense ad block after ONLY the first post on your front page. Since Google only allows you to have 3 adblocks on the page - this gives you the freedom to add Google Adsense in your sidebars, if you’d like. That you can accomplish by using a Text Widget - no problem!

As an example, this site is using a 336×280 Google Adsense block in this area and it works pretty nice!