A tool in the top toolbar that programmatically finds instances of the text you enter. You must be viewing a piece of content in order to see the search box. When you enter your search term and click Go, you can choose to search the text of the content, the notes, or outside sources, such as Google, Wikipedia, and YouTube.
Another search feature is available when the content in a course is organized into stacks. When viewing the list of stacks, you can search for a term in the title of each piece of course content, regardless of which stack it resides in.