I am using Drupal 7 and I am creating an Omega subtheme.
In my case I want a page without left and right sidebars. But when I inspect the page.tpl.php from alpha theme it contains only code for printing attributes, content and footer regions
Here is my page.tpl.php
print $attributes;
if (isset($page['header']))
print render($page['header']);
endif;
if (isset($page['content']))
print render($page['content']);
endif;
if (isset($page['footer']))
print render($page['footer'])
endif;
In the above snipped I don't find any option to show/hide sidebars as we used to do like in Garland theme.