FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -On the Design tab of the Ribbon, locate Slide Size in the Customize group, near the far right end of the toolbar. Select Slide Size, and then select Custom Slide Size.

Detailed explanation-2: -Change an existing layout On the View tab, in the Master Views group, click Slide Master. In the pane that contains the slide masters and layouts, click the layout that you want to edit. Edit the layout.

Detailed explanation-3: -To change the size of slide in PowerPoint, open the presentation to change. Then click the “Slide Size” drop-down button in the “Customize” button group on the “Design” tab in the Ribbon. To change the aspect ratio of the slides, then choose either a “Standard” or “Widescreen” aspect ratio.