Does anyone know why Microsoft offers both 16:9 Widescreen and 16:9 on-screen show? The difference is the measurement in inches. Widescreen is W13.333 x H7.5 whereas On-Screen Show is W10 x H5.63. But that difference actually doesn't mean anything, does it? Because once you go into Slideshow mode, both settings are 16:9 aspect ratio and would look exactly the same, and the actual inches don't really matter.

I don't understand why both options are there. What was the point of adding the 13.333 x 7.5 as an option (and now the default option)? Certainly I am missing something. Can anyone help me understand?

If my presentations are being displayed on a 16:9 display that is in a corporate conference room (displays are probably 5+ years old, 16:9), I am not sure what to think about the difference.

I assume there is some difference if you are copying content from a 4:3 standard and pasting into either of the above mentioned 16:9 aspect ratios. Is that the only thing to keep in mind here? I am struggling to think of a circumstance where this difference is important.

Thanks!