How to stop automatically expanding windows?

[hsze]

Hi: I notice that when I move a (finder or App) window and touch any margin, the window is automatically resized to maximum. How can I stop this? I didn't find any reference in the unfortunately very opaque new system settings.
Please help.

 

[iStorm]

System Settings > Desktop & Dock > Tile by dragging windows to screen edges

 

[hsze]

System Settings > Desktop & Dock > Tile by dragging windows to screen edges

Oh my goodness, that's it. Thanks!