In PowerPoint Slide Master view lets you edit all slides at once. Use the Slide Master PowerPoint feature to ensure a consistent look.
You can use Slide Master view to modify any slide layout in your presentation. It's easy to make small tweaks like adjusting background graphics and more significant changes like rearranging or deleting placeholders. Unlike the slide master, changes to a slide layout will only be applied to slides using that layout in your presentation.
In our example, our newly added logo is hidden behind the photo in the Picture with Caption Layout. We'll customize this layout to make room for the logo.
You can also move placeholders on the slide master, which will move the placeholders on multiple slide layouts at the same time. However, some slide layouts may still need to be adjusted manually.
You can also customize the text formatting from Slide Master view, including the font, text size, color, and alignment. For example, if you wanted to change the font for every title placeholder in your presentation, you could modify the master title style on the slide master.
Each title placeholder is connected to the master title style on the slide master. For example, take a look at the slides before changing the title font.
Now look at the same slides after changing the title font.
Instead of customizing individual placeholders, you could change the theme fonts for a presentation. From the Slide Master tab, click the Fonts command in the Background group, then select the desired fonts.