Another common addition to slides is to include headers and footers. The options to add headers and footers are in the same dropdown menu of the Text group. Once there, you will see the menu below.

From this menu, you can choose a variety of options for your header and footer. Footers are often used for a running title or to identify a particular author.

You can see the results of adding these options on the screenshot below. The final position of the boxes matches the Preview shown to the right of the header and footer box.