This scrapbook presentation focuses on the elements of public speaking - channel and visualization. It defines channel as the various mediums used to convey a message and provides examples like face to face interaction, radio, television, and social media. It also explains visualization as the picturization of the presenter and its role in coping with communication apprehension. The presentation includes instances supporting the discussion of both channel and visualization, as well as a YouTube video presentation by Yo-Yo Ma showcasing the importance of visualization in message conveyance.