The EMF picture displays unclear in a presentation when you set the "Zoom" level to more than 100% in Office PowerPoint 2007
KB Article: https://support.microsoft.com/kb/2533378
Consider the following scenario:
- You insert an Enhanced Metafile (EMF) picture in to a presentation in Microsoft Office PowerPoint 2007.
- You set the Zoom level to more than 100%.
- You change any parameter of the EMF picture in the Format Picture window.
In this scenario, the EMF picture displays unclear.