If fonts appear too large or too small when viewing a PowerPoint presentation, there are several steps to troubleshoot this issue:

1. Check your presentation’s scale setting: check the settings for the presentation scale to ensure that it is set to 100%.


2. Increase or decrease the font size: if the issue is not solved by checking the settings, attempt to manually adjust the font size.


3. Change the Zoom setting: if necessary, change the zoom out settings for the presentation.


4. Check the fonts: review the types of fonts that are being used in the document and set to default fonts that may help resolve the issue.


5. Review the compatibility settings: verify that the presentation is compatible with PowerPoint.