As you learned earlier in the chapter, themes are applied to slide masters to create the background, color, font, and effect formatting for a presentation. Some themes are built into PowerPoint, and you can also create and save your own themes as separate files and apply them to other presentations or even to other Office documents, such as in Word and Excel. In this section you learn how to create new themes, manage theme files, and apply themes across multiple presentations.
To create a new theme, first format a slide master exactly the way you want, including any custom layouts, backgrounds, colors, and font themes. Then save the slide master’s formatting as a new theme by following these steps:
On the Slide Master or the Design tab, click Themes, and click Save Current Theme. The Save Current Theme dialog box opens.
Type a name for the theme file in the File Name text box.
Click Save. The new theme is saved to your hard disk.
The new theme is now available from the Themes button’s menu in all presentations you create while logged in as the same user on the same PC. All of its formatting is available, including any custom color or font themes it includes.