The Sitemap Search extension, as its name implies, enables you to search your sitemap; pages, snippets and layouts
The Search tab is located under ‘Content’ to the right of ‘Pages’
The Search box is located in the lower bar of the index page for Pages, Snippets, Layouts.
If you have the the BannerRotator extension and/or the Templates extension installed, it will be on those index pages also.
And of course it is also on the Search Results page.
Enter your search string, and click the button. Results are sortable by attribute.