To apply a theme (to include color, formatting, effects, in a layout) to your presentation, on the Slide Master tab, in the Edit Theme group, click Themes, and then click a theme.
To change the background, on the Slide Master tab, in the Background group, click Background Styles, and then click a background..
On the View menu, click Normal, and then in the navigation pane, click the slide or slides that you want to change.
On the Design tab, in Customize, click Format Background.
Click Fill, and then click the Solid, Gradient, Picture or Texture, or Pattern option.
Choose the background fills that you want..
Changing the Background
option in the Background Styles dialog box).
In the Format Background dialog box, you can choose a solid or gradient as your background as well as a picture or texture.
Note that if you close the dialog box, the changes will happen only on the selected slides..
Stick with white or light beige on a dark background or black (or otherwise very dark color) on a light background.
Your slides will have a more professional appearance as a result.
Stay away from gradients in text unless the words are large and intended to be primarily decorative in nature..
Open the PowerPoint presentation and go to the slide where you want to add a background image.
If you want to add it to all of your slides, add it to any slide.
Select Design > Format Background.
Or, right-click on the slide and select Format Background.
The Format Background pane opens.
To add a picture as the background image for a PowerPoint slide:
Open the PowerPoint presentation and go to the slide where you want to add a background image.
If you want to add it to all of your slides, add it to any slide.
Select Design > Format Background.
Or, right-click on the slide and select Format Background.
The Format Background pane opens.
