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When you open a new presentation in Google Slides, the slides are horizontal by default. Luckily, if you want to change them from horizontal to vertical, it’s a simple process you can do in a couple of steps.

Fire up your browser, head to Google Slides, and open a new presentation.

Open a new document.

After the presentation opens up, click File > Page Setup.

Click File > Page Setup.

Next, click on the drop-down list and choose “Custom” from the choices below.

Click the dropdown menu and click "Custom" from the list below.

In the text fields that appear, type in the dimensions you want your slides to appear. The first box is for width, and the second is for height, while the drop-down box provides other measurements, such as centimeters, pixels, and points.

For a default slide, the dimensions are 10 x 5.62 inches. Swap the two numbers around to rotate the slide into a vertical position. It will look like this:

Swap the numbers in the text fields to rotate the slide into vertical position.

When you’re done, hit the Enter key or press “Apply” to make your slides vertical.

TADA! The slide has now been converted into vertical position.

All slides added will be in the vertical orientation. There isn’t a way to incorporate both vertical and horizontal slides in a single presentation at the time of writing.

That’s all there is to it. This method can be applied to existing slides in a presentation as well. However, it’s not recommended since the content on each slide would need to be resized and repositioned.

Brady Gavin Brady Gavin
Brady Gavin has been immersed in technology for 15 years and has written over 150 detailed tutorials and explainers. He's covered everything from Windows 10 registry hacks to Chrome browser tips. Brady has a diploma in Computer Science from Camosun College in Victoria, BC.  
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