Kristin Woolever writes, "Technical professionals must be skilled not only in writing clearly, but in presenting their ideas orally as well" (409).
In the book Technical Communication, Lay and co-authors show the various ways tech writers give presentations, such as:
Whether it's explaining progress on a project or holding a press conference on a new product, tech writers are forced to communicate their ideas concisely and clearly to a specified audience. With presentation software, like PowerPoint, they can easily highlight key points and visually display information.
Lay, Mary M., et al. Technical Communication. Boston: Irwin/McGraw-Hill, 1995.
Woolever, Kristin R. Writing for Technical Professions. New York: Longman, 1999.