I’m posting this since a dev wondered if this addition would be well received. Bug 509287
1- The rubberband selection should cause the part of the windows that are over the rubberband selection to become see-through/X-ray/transparent; allowing you to select items with precision without having to ever minimize your windows, which can be an annoyance.
2- Obviously it won’t work when windows are maximized.
3- This would be very useful for any window you constantly drag items into, like Dolphin.
4- While this see-through effect is in effect; if an item is selected underneath a window, the rubberband selection will remain active until you drag any of the selected items or deselect them by clicking anywhere else, including the empty spaces of the rubberband selection. (Without this addition it would only be possible to use the see-through feature if at least one of the items weren’t underneath a window, making it gimmicky.)
… It would also work to auto-hide all windows the moment the rubberband selection starts, but I believe it would be visually confusing (and less cool) if it’s implemented like that.

