Display the slide master.
Slide master makes it easy to change elements such as fonts, object location, layout, and the design of multiple slides at once.
All presentations includes one slide master by default, and you can change or add slide masters as needed. To apply two or more styles or themes to a presentation, you have to insert the slide master for each theme.
As you can create multiple slide masters in a single presentation, you can create more compelling documents off the monotonous presentation document by organizing your designs in different sections.
Slide masters and layouts have a tree structure, and 12 standard layouts are provided by default per a slide master.
You can add placeholders to slide masters or layouts, but you can not directly add placeholders to slides.
Slide master is the top-level slide in the slide tree structure that stores the presentation's layout and all the theme information, including background, color, font, effect, and placeholder size and position.
When you modify a slide master, the changes are applied to all the child layouts associated with the slide master, and all the style changes are applied to the slides that follow the master.
As part of the slide master, a layout defines the location and format of content to be displayed on the slides, and aligns the objects and text on the slides.
By default, 12 standard layouts are provided for the slide master.
By using Insert Layout, you can add layouts that differ from standard layouts, and you can use Create Placeholder to create your own custom layouts and add them to a location in the size of you want.
A master is used to organize the basic elements (i.g. placeholder, header and footer, slide number, etc.) of a slide to make these elements common across all slides. Therefore, the contents of the slide such as text and objects that you enter randomly are not displayed in master view.
To check the contents of the slides and the layout when printing, click File > Preview and then select an item you want under Print Target on the toolbox.