This document summarizes a presentation by Lucien Lee on using Keynote for prototyping. Some key points: - Keynote is introduced as an easy first step for prototyping, especially for those without experience in digital prototyping tools. It allows for quick modifications and experimentation early in the idea stage. - Keynote can be used to prototype with teammates who are not designers, such as PMs, as it is relatively simple to learn. - Tips are provided on setting up Keynote for prototyping, including sketching screens and transitions, as well as enabling gestures and motion blur. - While simple, Keynote allows expressing basic interactions