Tools Manual Detailed information and step-by-step instructions for all tools in D2L. Quick Start Guides Guides to complete common tasks in a D2L course site. Video Tutorials Short video tutorials of the information provided in the Tool Guides section of the Help Pages. FAQs Answers to our most frequently asked questions. Instructional Tutorials Listing of short, self-paced D2L courses that provide information, instructions, and best practices on selected topics. D2L guides, videos and resources for University of Arizona instructors.