Game won't display in windowed mode

I’d like my game to display in windowed mode only at the resolution specified (see settings in attached image), but instead, the game always opens full-screen at 1920x1080. What am I doing wrong?

Bump…

Is this the wrong place to post this question?

Someone called NCarter in the Unity3D helped me find the problem: I needed to have the “Others” aspect ratio selected. Thanks, NCarter!