Click the Master Page tab at the bottom left of the window.
On the File menu, click Page Setup. The Page Setup dialog box opens.
Click the Paper Size tab, and click Screen Size in the list box.
Adjust the margins, if desired.
If you want a background color or fill, choose the Page Fill option on the Margins page and click the Page Fill button
. The Interior Fill tab of the Object Format dialog box opens. Choose any fill style and click OK.
Click OK to close the Page Setup dialog box.
Place any items on the Master Page that you want repeated on every slide, such as a title, border, or logo.
When you finish defining the Master Page, click the Page button at the bottom left of the window and choose Page 1. You are now ready to build the slide show. Place each drawing or image that you want to appear as a slide on a different page of the document.
After you have your slides defined, you can add transition effects and control the speed and direction of the transition for each slide. You also can choose whether the presentation advances manually or automatically.