This is a much abbreviated version from an email:Convert 4:3 powerpoint presentations to 16:9 (wide-screen)Keynote (apple) can resolve this problem.1) Open the original presentation in Apple keynote.2) Open the inspector, choose document >slide size Choose the new size 3) Export the new presentation from Keynote to Powerpoint.Workaround from Microsoft:http://office.microsoft.com/en-us/powerpoint/HA011420901033.aspx