A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Hi,
One possible reason why the slide is being inserted sideways could probably happen because there were changes made.
Have you made any changes prior to the issue? Let's try to troubleshoot the issue by repairing the Office application. Click on this link for the procedure. We also advise checking if there are any pending updates, if yes, please update the app. An outdated version could also be a cause.
We look forward to your update.
Regards.