I can move widget outside of canvas borders, only if its already inside canvas. Also if i move widget outside, and deselect it, then i cannot see this widget and select again, only via hierarchy list.
SDesignerView used only by UMG editor (SWidgetBlueprintEditor). But Blueprint editor (SBlueprintEditor) using SGraphEditor… I suppose SDesignerView and SGraphEditor is 2 different widgets with similar functionality.
I am looking for a way to do this as well. I need similar functionality as the SDesignerView but it seems overtly complicated. Have you found a workaround for this? Guess I will have to start digging into this