<li><strong>root_of</strong> =><em>post ID or object</em>: Find the root category the post belongs to and search for posts from that category and in all children.</li>
<li><strong>from_post</strong> =><em>post ID or object</em>: Search for matching posts in the category this post belongs to.</li>
<li><strong>previous</strong> =><em>category ID or slug</em>: Search for matching posts in the category before the provided category as defined in the storyline structure.</li>
<li><strong>next</strong> =><em>category ID or slug</em>: Search for matching posts in the category after the provided category as defined in the storyline structure.</li>
<li><strong>level</strong> =><em>storyline level</em>: Search for posts in the categories defined at this level in the storyline structure, with level 1 being the topmost categories, level 2 being their direct children, etc.</i>
In order for <em>ComicPress Core</em> to be able to work properly, it needs to be able to work with posts that are not part of the current page's Loop.
WordPress stores information on the current page's Loop in what are known as <strong>global variables</strong>.
Programmtically, it can be tricky to keep track of and manage these variables. <em>ComicPress Core</em> handles all of this for you using the <code>Protect()</code>,
<code>Unprotect()</code>, and <code>Restore()</code> functions.
</p>
<p>
For example, you have a comics category with the slug <strong>comic</strong>.
If you want to display the latest comic at the top of your home page, above your blog posts, you would use <code>Protect()</code> and <code>Unprotect()</code> like this:
echo 'The current post title: '; echo the_title();
RT('first', 'comic');
echo 'The first comic title: '; echo the_title();
Unprotect();
echo 'The current post title: '; echo the_title();
</pre>
<p>
These are also available as action and filter hooks, to keep your theme safe when <em>ComicPress Core</em> is deactivated as an alternative to <code>function_exists()</code>:
</p>
<preclass="prettyprint lang-php">
do_action('comicpress-Protect');
if (apply_filters('comicpress-RT', 'last', array('child_of' => 'comic'))) {