Which of the following is NOT a valid PowerPoint view?

PowerPoint offers various views to help users efficiently create, organize, and present their slides. Understanding these views is fundamental to navigating the software effectively. The Normal View is the primary editing interface, displaying the slide, outline/thumbnails, and notes pane. The Outline View focuses on the text content, allowing for easy organization of bullet points and headings. The Reading View presents the slideshow in a window, ideal for reviewing without full-screen projection. However, Page Layout View is NOT a valid PowerPoint view. This view is a feature commonly found in word processing applications like Microsoft Word, where it's used for arranging text and objects on a page for printing purposes, focusing on margins and page breaks. PowerPoint does not utilize a "Page Layout View" for its slide-based presentations.