Adding Slide Numbers in Powerpoint 2010
Just like you have page numbers for books, it is usually a good idea to add slide numbers to presentations. There are two ways you can add slide numbers to your presentation and this chapter will show you both those techniques.
Step 1 − Under the Insert ribbon, Text group click on Slide Number command.

Step 2 − The Header and Footer dialog opens up.

Step 3 − Check the Slide number check box.

Step 4 − The Preview shows the section where the slide number will be placed.

Instead of clicking on the Slide Number command, you can also click on the Header & Footer menu item to launch the same dialog as in Step 2.
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