You can change the layout of any slide
in your presentation at any time. Here's how:
From the Format menu,
select Slide Layout.
The Slide Layout screen opens. Choose the type of
layout you desire by clicking it once. If you wish to
apply the layout to a new slide, click on the arrow beside the
layout image, and choose Insert New Slide.
If you wish to
apply the layout to a new slide, click on the arrow beside the
layout image, and choose Insert New Slide.