• 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 either Standard (4:3) or Widescreen (16:9). When PowerPoint is unable to automatically scale your content, it prompts you with two options: • Maximize: Select this option to increase the size of your slide content when you are scaling to a larger slide size. Choosing this option could result in your content not fitting on the slide. • Ensure Fit: Select this option to decrease the size of your content when scaling to a smaller slide size. This could make your content appear smaller, but you’ll be able to see all content on your slide. The 16:9 widescreen setting is the default value for new presentations you create.

When you change the slide size for a presentation, the size you choose only applies to that presentation. However, you can make it easy to create a new 4:3 presentation for yourself whenever you want—by defining a custom theme that uses the 4:3 aspect ratio.

Jul 6, 2017 - How to Change the Dimensions of an Image (OSX). Aspect ratio is the width of the image in relation to the height. Aspect ratio is written as. In a previous post, we discussed how you can change video aspect ratio on Samsung galaxy phones. You can check it out now if interested. Today, we will share a quick method to alter video aspect ratio from 16:9 to 4:3 on Mac and PC computers. How to change video aspect ratio from 16:9 to 4:3 on computer? You need a video converter for this job.

• 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. • In the Slide Size box, click the down arrow next to Slides sized for and select an option. • 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. The Slide Size dialog box opens.

• In the Slide Size dialog box, ensure the orientation is set the way you want it. • In the Height and Width boxes, PowerPoint accepts measurements in inches, centimeters, or pixels. Type a number followed by a space and then the appropriate abbreviation: in, cm, or px. Width or Height Minimum: 1 in 2.54 cm 120 px Maximum: 56 in 142.24 cm 720 px PowerPoint then converts measurements, if necessary, to the type of unit your operating system uses. When PowerPoint is unable to automatically scale your content, it prompts you with two options: • Maximize: Select this option to increase the size of your slide content when you are scaling to a larger slide size.

Choosing this option could result in your content not fitting on the slide. • Ensure Fit: Select this option to decrease the size of your content when scaling to a smaller slide size. This could make your content appear smaller, but you’ll be able to see all content on your slide. You can if you like.

This version of PowerPoint has a default size of 16:9 for new presentation, but you can create a different default for yourself. • Start PowerPoint. • On the File tab of the toolbar ribbon, select New. Then double-click the Blank Presentation to create a new, empty presentation. • Then on the Design tab, click Slide Size and choose the size you want for a default.

(If you want a different default slide size than what's listed there, select Custom Slide Size and then choose your size in the Slide Size dialog box, and then click OK.) • On the Design tab, click the More arrow in the bottom-right corner of the Themes group: • Select Save Current Theme. • Give your theme a name that you'll remember easily and click Save. Don't change the folder that the new theme is to be saved in. • On the Design tab, click the More arrow again in the bottom-right corner of the Themes group. You'll see your newly saved theme under a Custom heading. • Right-click that new custom theme under the Custom heading, and then select Set as Default Theme: • Close PowerPoint.