2
Windows 8 has a minimum resolution of 1024x768, unless you are running it in a VM. As such it doesn't support going into 1280x720 (since 720 < 768). Windows 7 allowed this, but the modes are missing from Windows 8.
My video card and monitor support 1280x720
But it is missing from the slider:
How do I force windows 8 into 1280x720 ?
2What's stopping you from selecting the desired mode (in your first screenshot)? That works for me. – Bob – 2012-12-14T12:00:24.147
Why don't you just pick 1280 x 800? You are only talking about a small difference and the resolution requirement only exists because of Windows Store Applications. – Ramhound – 2012-12-14T12:12:02.667
@Bob - For some reason that didn't work the first time, but when I tried it again it worked. Thanks! – Jim McKeeth – 2012-12-14T16:48:53.340
Well, you can attempt click on the slider and use the arrow keys on the keyboard instead. – Tamara Wijsman – 2012-12-14T17:00:57.023
@TomWijsman Did you try that Tom? Because on my computer the arrow keys only take you to the tick marks, which doesn't include 1280x720 (as per the screen shots). Curious how you got it to work like that on yours. Do the arrow key give you single pixel granularity? – Jim McKeeth – 2012-12-14T21:09:57.290
I can't try (not using Windows), was just a guess, thanks for trying. – Tamara Wijsman – 2012-12-14T21:25:35.063