August 17


One of the great things about designing in PowerPoint is that you can create custom slide sizes. You can use these custom slide sizes for everything from YouTube thumbnails, blog post featured images, social media posts, and more. You can even use them to create low content books! In the video above and written tutorial below, I show you how to easily change the slide size in PowerPoint.

Change the Slide Layout in PowerPoint

When you open up your PowerPoint presentation, by default, you’ll start off with a slide that is in landscape rather than portrait. Also by default are placeholders for a title and subtitle.

change the layout on a PowerPoint Slide

I like to start off by deleting the placeholders for the title and subtitle. You can do that one of two ways:

  • Click on the dotted lines that you see around the title and subtitle, and then delete.
  • From the Home tab, under the Layout dropdown menu, select the blank slide option.

change the slide layout in PowerPoint

Change the Slide Size in PowerPoint

Depending on how you’re going to use the image you create in PowerPoint, you may or may not need to change the slide size. For instance, if you’re going to create a YouTube thumbnail in PowerPoint, you can use the default widescreen slide size, because that size has the perfect dimensions for a video thumbnail. I also find the default slide size to work well as my blog post featured images.

Change the Slide Size in PowerPoint in the Design Tab

If you don’t want to use the standard slide size in PowerPoint, you can change the slide size under the design tab, Slide Size, and Custom Slide Size as shown in the image below.

Change the slide size in PowerPoint

After you click on Custom Side Size, input the desired image dimensions. For example, in the image below, I’ve set the dimensions as 7.5″ x 7.5.” I chose those dimensions since I was creating the image for Instagram, and thus wanted a square image.

How to Change the PowerPoint Slide Size the Easy Way

One of the easiest ways to change the slide size in PowerPoint is to use one of the default slide sizes. Here are a few examples.

Change the Slide Size from Landscape to Portrait

graphic design in PowerPoint


First of all, you can change the default landscape orientation to portrait, as show in the image above. You can see that the width and height dimensions are flipped, but are otherwise the same.

Another easy option is to select from the standard slide sizes. As an example, if you wanted to create pages for a low-content book in PowerPoint, you might select the Letter Paper (8.5×11 in) size as show in the image below.

how to change the slide size in PowerPoint for low content books
The thing that I love about this is that if you choose this slide size, PowerPoint automatically puts in margins so that you don’t have to set up margins for your book.

So that’s how you customize the canvas size for your images in PowerPoint.

Recommended Resources

If you want to go beyond the built in PowerPoint templates, I highly recommend PresenterMedia PowerPoint templates. I use them for images and videos. It's the most reasonably priced premium PowerPoint template source I've found. 

PowerPoint 365

While you can do everything in this video and article in older versions of PowerPoint, I strongly recommend PowerPoint 365 if you want to take your graphic design skills up a notch. 


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