Add a background picture to slides - Microsoft Support
You can use a picture as the background for a slide or slides. You can adjust the picture's transparency after you add it to the slide. Right-click the margin of the slide and then select Format Background. In the Format Background pane, choose Picture or texture fill. (This option is unavailable if you haven't Copied a picture.)
Change the background of slides - Microsoft Support
You can add a solid or gradient color, a pattern, or an image as the background of a slide or an entire presentation. At the far-right end, select Format Background. The Format Background pane opens on the right side of the window. Under Fill, select Solid fill, Gradient fill, or Pattern fill.
Add a background picture to your slides - Microsoft Support
Select the slide you want to add a background picture to. Select Design > Format Background. Right-click the margin of slide and select Format Background. In the Format Background pane, select Picture or texture fill. Select File. In the Insert Picture dialog box, choose the picture you want to use and then select Insert.
Create your own theme in PowerPoint - Microsoft Support
Create your own theme in PowerPoint. To make a custom theme, start with a built-in Office theme and modify it by changing any of the colors, fonts, or effects: Change the theme's color, font, and effect settings. Save the settings as a new theme in your theme gallery. These steps are described below. Customizing theme elements.
Save a slide design (theme) as a template - Microsoft Support
If you create a slide design (theme) and you want to save it as a template (.potx file), simply do the following: Open the presentation that contains the slide design (theme) that you want to save as a template.
Apply a template to an existing presentation - Microsoft Support
If you don't have existing slides to import, simply begin creating slides in your new file. If you have some existing slides that you want to apply the template to, see the section Apply the new template to existing slides below.
Free background templates for PowerPoint - Microsoft Support
To browse a wide range of templates with backgrounds, search for "Backgrounds." For the background images shown above and more, search for the template called "Backgrounds for PowerPoint slides." For backgrounds specific to a theme, search on a …
Free background templates for PowerPoint - Microsoft Support
You can create memorable and attractive presentations by using many of the templates that come with PowerPoint. Use the picture, shape, and graphic effects in these templates to add colorful, elegant, or playful backgrounds to your presentation.
Add a DRAFT watermark to the background of slides - Microsoft …
PowerPoint doesn't have a gallery of ready-made watermarks like Word has, but you can still manually put a text background in your slides to get that watermark effect. To indicate that your presentation is a draft copy, add the watermark text "Draft" to the background of your slides.
Use multiple themes in one presentation - Microsoft Support
If you want your presentation to contain more than one theme (layouts that contain colors, fonts, and effects), add another slide master to it, and apply a theme to the new slide master.
Remove or change the current theme - Microsoft Support
Point the mouse at the theme you want to apply. Right-click it, and then select Apply to Selected Slides. If you change your mind, you can undo immediately by pressing Alt+Backspace, or you can repeat step 3 with a different theme.
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