- Select INSERT > HEADER & FOOTER from the drop-down menu.
- Check the Footer box on the Slide tab.
- Type the text you wish in the area below Footer, such as the presentation title.
- To add the date and time to your slides, check the box.
- To add that to your slides, look for the Slide number.
- Check Don't show on title slide to prevent the footer from appearing on the title slide.
- Apply to All is selected. Alternatively, click Apply instead of Apply to All if you only want the footer information on the selected slide.
Read More: Is it allowed to make a PDF of the PowerPoint presentation?