The default page orientation for slides in Microsoft PowerPoint is Landscape. This means that the slide is wider than it is tall. This orientation is specifically chosen for presentations because it maximizes the horizontal space available for content, images, charts, and text, making it ideal for display on projection screens, monitors, and televisions, which are typically wider than they are tall. This design choice ensures that presentations are visually appealing and easy to read for an audience.
In contrast, Portrait orientation means the page is taller than it is wide. This is the default orientation for word processing documents, such as those created in Microsoft Word, as it is more suitable for reading and printing text-heavy documents. Vertical is synonymous with Portrait, and while Horizontal is synonymous with Landscape, 'Landscape' is the specific and correct terminology used within PowerPoint and other software applications to describe this orientation. Therefore, Landscape is the standard default for PowerPoint slides.