Creating slide masters
You can create a new slide master in a similar way to modifying the default slide master.
To start, enable editing of slide masters by View > Master > Slide Master.
On the Master View toolbar, click the New Master icon (highlighted in the figure).
Master View toolbar
A second slide master appears in the Slides pane. Modify this slide master to suit your requirements. It is also recommended that you rename this new slide master. To do that, right-click on the slide in the Slides pane and select Rename master from the popup menu.
When you are done, close the Master View toolbar to return to normal slide editing mode.