Hi,
Regarding of the issue, please provide us more information to assist you better.
- Which view was this issue occurred with? Normal view, slide show or other view.
- Have you encounter this issue with other program? Such as Word, PDF reader.
Based on my test with my local environment (Windows 10 and Office 2013), I can't reproduce this issue now. Do you mind sharing us a screenshot about your issue?
Then, I recommend you try to modify the Windows 10 DPI values. We do so by navigating to Settings, System, Display. (Or, simply right-click the desktop and choose Display Settings from the pop-up menu that appears.) To adjust the display scaling in bumps of 25 percent, simply adjust the slider under Change the size of text, apps, and other items.
Regards,
George ZhaoTechNet Community Support