How to Change Slide Size in
Google Slides
Open your Google Slides presentation.
Click on "File" in the top menu bar.
Select "Page setup" from the dropdown menu.
Click the dropdown box and choose "Custom" to enter specific dimensions.
Set the desired width and height (e.g., 16:9 for widescreen or 8.5 x 11 inches for portrait).
Click "Apply" to change the slide size.
Adjust your content if needed to fit the new dimensions.