With Window Behavior -> Titlebar Actions -> Middle button set to "Start Window Tab Drag", attempt use middle button to drag window. Window does not move. Using kubuntu-desktop APT bundle in 17.04 distro. Unable to identify KDE version.
Window tab support is currently not implemented as listed in https://community.kde.org/Plasma/5.9_Errata#Missing_features
(In reply to Martin Gräßlin from comment #1) > Window tab support is currently not implemented as listed in > https://community.kde.org/Plasma/5.9_Errata#Missing_features Ah, I see that now, thank you. Is there an issue that I may track to be informed about when this regression is fixed? I've been running KDE 4 for the past year because of this missing feature.
> Ah, I see that now, thank you. Is there an issue that I may track to be > informed about when this regression is fixed? I've been running KDE 4 for > the past year because of this missing feature. We currently don't have any time line on it. With all of GTK going to CSD I'm not even sure it makes sense to add it as it means a weird user experience (why can't I add Libreoffice?)
(In reply to Martin Gräßlin from comment #3) > We currently don't have any time line on it. With all of GTK going to CSD > I'm not even sure it makes sense to add it as it means a weird user > experience (why can't I add Libreoffice?) I'm not always sure what weird means, but I understand utility. I currently cannot group knotes windows with each other or with other windows because they eschew window manager decorations. I don't regard it as weird, but rather, a feature of that particular application which I have accepted. Still, grouping with window tabs is immensely convenient for dynamically reorganizing elements of my workspace, which typically includes xterms or emacs frames and is a key part of the workflow I have become accustomed to. Now I'm just coming up to speed on this and I had to go learn what CSD means. And I'm bewildered. What is the point of having a window manager if not to provide a consistent user interface for managing windows? It would seem that the placement, sizing and grouping of windows is its core responsibility, and only very exceptional applications should reasonably override WM preferences. I haven't thought through all of the implications, but I would be OK with a heavy-handed approach that encapsulated a window with CSD within a WM frame, if only to restore functionality I find extremely useful. And yeah, that could be weird... but I prefer ugly and weird to broken. Just my thoughts.