How To Change Slide Size In Keynote: A Comprehensive Guide

January 9, 2024 3.8K views

Adjusting presentations for various screens can be tricky. You don't need to fret with Keynote's dynamic slide size options. Have you ever struggled to get your slides to fit just right? Our "Keynote Change Slide Size Guide" is the answer. You'll learn how to customize your content, ensuring a seamless display across all devices. Make every presentation moment count, no matter the screen size.

How To Change Slide Size In Keynote (Easy steps)?

Step 1: Open the Keynote application on your iPhone.

Keynote Change Slide Size

Step 2: Find and select the specific slideshow you wish to edit.

Step 3: Tap the three-dot icon in the screen's top-left corner.

Keynote Change Slide Size

Step 4: Scroll down the menu and select "Document Setup." A new menu will appear at the bottom of the screen.

Keynote Change Slide Size

Step 5: Click on "Slide Size" in the bottom-right corner.

Keynote Change Slide Size

Step 6: Pick the slide whose dimensions you intend to adjust.

Step 7: Choose your desired slide size or aspect ratio from the options at the bottom of the screen.

Step 8: Tap the "Done" button in the top-left corner to apply and save the changes.

Keynote Change Slide Size

Change Slide Size In Keynote On Mac

Step 1: Use Command + Spacebar to bring up the Spotlight Search. Input "Keynote" into the search bar and hit the Return key.

How To Change Slide Size In Keynote

Step 2: Navigate to the slideshow you wish to modify. Highlight the particular slide you want to resize.

Step 3: Click the "Document" option on the top-right section.

How To Change Slide Size In Keynote

Step 4: Search for the "Slide Size" section in the Document pane.

How To Change Slide Size In Keynote

Step 5: Open the dropdown list and choose the slide size that meets your needs.

How To Change Slide Size In Keynote

Step 6: Use the Command + S shortcut to save your modifications.

To Set a Custom Slide Dimension

Step 1: In the dropdown list, opt for "Custom Slide Size."

How To Change Slide Size In Keynote

Step 2: Input your desired measurements for both Height and Width.

How To Change Slide Size In Keynote

Step 3: Confirm the new measurements by clicking "OK."

Keynote Change Slide Size Guide

Step 4: Again, save your updates to the presentation by pressing Command + S.

What Will Affect Keynote Slide Size?

Several factors can influence the slide size when using Apple's Keynote software to design presentations. When considered carefully, these factors will help ensure your representation is displayed effectively and professionally.

What Is Slide Size, And How Does It Affect The Overall Presentation?

Slide size, fundamentally, is the dimension and proportion of the space where your content appears in a presentation. It's essential to match the aspect ratio of your chosen slide size to the display you'll be using to avoid unsightly black bars or stretched content.

Visual Appeal

The correct slide size ensures that your visuals fit neatly, with everything in proportion, making your presentation look professional.

Content Legibility

An incorrect size might lead to cropped or overstretched text and images, making it easier for the audience to read or understand.


Using a uniform slide size maintains a consistent look throughout your presentation, ensuring smooth transitions and a unified visual experience for the audience.

Different Slide Size Options Available In Keynote

Keynote provides users with various slide sizes to suit multiple display needs. The most common aspect ratios are:

4:3 – This is a traditional aspect ratio, ideal for older projector screens and standard computer monitors.

16:9 – Perfect for widescreen displays like modern TVs and monitors.

16:10 – A standard ratio for many modern computer screens, especially laptops.

Exploring The Default Slide Size Settings

When you open Keynote and start a new presentation, the software defaults to a specific slide size based on shared uses. However, there may be more suitable settings depending on your particular needs or the device you're presenting on.

Accessing Slide Size Settings

To view or change the slide size, go to the Document option in the upper right corner of the app. Clicking on it reveals a panel where you can adjust various settings related to your presentation.

Tabs and Options

Inside the Document panel, there are multiple tabs. For slide size adjustments, ensure you're on the tab labeled "Document." Here, you can choose from predefined sizes or customize the dimensions to your needs.

Custom Sizes

If none of the standard aspect ratios fit your requirements, Keynote allows you to set custom dimensions. Ensure you know the aspect ratio of your display screen when choosing a custom size to avoid visual distortions.

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With a 200MB footprint, WPS Office is efficient without compromising features. Its compatibility ranges from Windows 7 to the latest Windows 11.

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Unlike some competitors that may sideline Mac users, WPS Office offers a Mac version that promises an optimized and rich user experience.

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Changing Slide Size in WPS Presentation

Step 1: Open your WPS Presentation.

Step 2: Navigate to the "Design" tab at the interface's top.

Keynote Change Slide Size Guide

Step 3: In the "Design" tab, click the "Slide Size" button.

Keynote Design Templates

Step 4: From the drop-down menu, you can quickly select common slide sizes such as "Standard Screen" (4:3 ratio) or "WideScreen" (16:9 ratio).

Keynote Change Slide Size Guide

Step 5: If you want to customize the slide size further, click "Custom Size." A dialog box called "Page Setup" will appear once you click this button.

Keynote Change Slide Size Online

Step 6: Alternatively, you can also access the "Page Setup" dialog box directly by clicking the "Page Setup" button within the "Design" tab.

Keynote Change Slide Size Online

Step 7: Multiple preset slide sizes are available for selection in the "Page Setup" dialog box.

Step 8: To manually adjust the slide dimensions, enter the desired values into the "Width" and "Height" fields.

Step 9: The slide numbering starts from "1" by default. If you wish to change this, locate the "Number slides from" option and input the desired starting number. For example, entering "3" will begin the slide sequence from the third slide.

Step 10: "Paper Size" is an option that allows you to adjust the size according to the paper dimensions you intend to use when printing the slides.

Step 11: Within the "Orientation" section, you can set the slides to be displayed in "Portrait" or "Landscape" mode based on your requirements.

Keynote Change Slide Size Online

Step 12: Once all changes are made, click "OK" to save and apply the adjustments.

Keynote Change Slide Size Online

How To Download WPS Office?

Step 1: Open your preferred web browser.

Step 2: Go to the WPS Office website.

How to download WPS Office

Step 3: Navigate to the "Download" section or look for the download button on the homepage.

Step 4: Choose the version suitable for your operating system (e.g., Windows, Mac).

How to download WPS Office

Step 5: Confirm the download by clicking the download button.

How to download WPS Office

Step 6: Once downloaded, open the installer and follow the on-screen instructions to complete the installation.

Step 7: Launch WPS Office and explore its diverse tools and features after installation.


How Do I Ensure My Presentation Looks Good On Small And Large Screens?

Choose a suitable slide size to optimize your presentation for small and large screens and ensure text and visuals remain legible. Embrace a simple design with contrasting colors, minimize excessive animations, and test on various devices, considering responsive design principles.

Can I Change The Slide Size For An Existing Presentation Without Affecting Its Content?

Yes, changing the slide size of an existing Keynote presentation without impacting its content is possible. It means that you can adjust the dimensions of your slides while preserving the integrity and layout of the information they contain.

What Is The Recommended Slide Size For Sharing Presentations On Social Media?

The ideal slide dimension for disseminating presentations across various social media channels differs based on the specific platform. Nevertheless, a widely accepted measurement for such slides is a 16:9 aspect ratio, translating to a resolution of 1920 pixels in width and 1080 pixels in height.


The article details how to adjust slide sizes in Keynote on iPhone and Mac, emphasizing the importance of slide size for presentation quality. It also introduces WPS Office as a potent alternative to Keynote due to its myriad features.

WPS Office stands out with its comprehensive features, affordability, and user-friendliness. It offers advanced tools beyond the basics, ensuring compatibility across devices, including Mac. Its collaborative capabilities and rich template store make it a compelling alternative to Keynote.

15 years of office industry experience, tech lover and copywriter. Follow me for product reviews, comparisons, and recommendations for new apps and software.