How do you move an app shortcut between launcher screens? So I have a few icons and folders on the leftmost launcher screen.  I want to move them to the middle one.  You'd think that you'd do it by dragging the icons to the dots on the lower left/ lower right corner, but that doesn't work.

I know it's possible to do because I've actually done it few times, somehow, but I can't figure out how to do it in any kind of reliable way.
Drag the icon to the edge, not the corners.  It can be a little finicky depending on the particular touchscreen hardware your phone has.