Saving a Copy of a Presentation
If you want to duplicate your open presentation, you can save it using a different name
To save a copy of a presentation in Mac OS X v10.7 (Lion) or later:
Choose File > Duplicate.
An untitled copy of the presentation is created. Both copies remain open on your
desktop for you to view or edit.
Close the window of the untitled copy, type the presentation's name, and then choose
a location from the pop-up menu.
To save a copy of a presentation in Mac OS X v10.6.x (Snow Leopard) or earlier:
Choose File > Save As and specify a new name or location.
When the presentation is copied in this way, the original presentation is closed; the
presentation that remains open on your desktop is the new copy you created. To work
with the original version, choose File > Open Recent and choose the previous version
from the submenu.
You can also automate creating a backup of the presentation every time you
save, retaining the name and location of the original, but with the words “Backup
of” preceding the filename. See “Automatically Saving a Backup Version of a
Presentation” on page 33.