Use a slide master to add consistency to your colors, fonts, headings, logos, and other styles, and to help unify the form of your presentation.
You can change a slide master’s colors, fonts, or effects. You can hide or show placeholders.
Change the slide master:
1. Select View > Slide Master.
2. Make the text, color, and alignment changes you want.
3. If you want to use a predefined theme, select that first by clicking Themes on the Slide Master tab.
4. Then proceed with selecting Colors, Fonts, Effects, and Background Styles.
5. When you’re done, select Close Master View.
/
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.
Add a watermark:
1. Select View > Slide Master.
2. Scroll to the top of the thumbnail pane and select the Slide Master at the top.
3. Select Insert > Text Box, then drag to draw a text box on the slide
4. Type the text you want in the text box.
Change the look of the watermark text
1. Click and hold the rotation handle at the top of the text box by moving the mouse left or right.
2.Select the text in the text box.
3. Choose a light font fill color, and make any other changes to the font and style.
4. Close Slide Master. All slides in your presentation will have the watermark text.