You are creating a presentation and you have come to the last slide. you still have more information to add. what should you do?

place the information on other slides that already exist.
click in the task pane.
click on the new slide icon.
select the new slide option from the format menu.

Click on the New Slide icon.

Explanation:

You need to create a new slide to add more information to your presentation, you cannot just squeeze all bits of remaining info onto previous slides.  First, the information might not be related, second it will overload the slides, not good for presentations.

The "New Slide" option wouldn't be in the "Format" menu, since that menu is for the formatting of the text and slides, not to add a new one.