PowerPoint uses the 16:9 widescreen aspect ratio by default for all new presentations. To change this to 4:3, save a 4:3 presentation to the main gallery (via "Save Current Theme" on the "Design ...

Change the size of your PowerPoint slide to a good poster size, such as 2-by-3 feet , and decrease the view percentage on your computer screen to around 25 percent, or the smallest view that still ...