System Settings -> Application Style -> Window Decorations Item 'Spacer' does not appear in the available items to place in the Title Bar. Reproducible: Always
Confirmed in 5.4.2 and latest git.
*** Bug 358259 has been marked as a duplicate of this bug. ***
*** Bug 362133 has been marked as a duplicate of this bug. ***
*** Bug 375657 has been marked as a duplicate of this bug. ***
*** Bug 377727 has been marked as a duplicate of this bug. ***
Closing some of my old bug reports that aren't being acted upon. (There needs to be a resolution category "Died - Old Age") To anyone on the "cc" list - please re-open if you feel the need.
I am still waiting on it and there are quite a few duplicates linked. When using additional buttons, like "always on top" or only the quickhelp question-mark button, it is kind of too much to have more than (the usual) three buttons in a group, but having, for example, a second group "question mark, always on top" is useful and was may usual setup in plasma4.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/4888
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kdecoration/-/merge_requests/54
Git commit 4612e0f003a3b668a9bb733feb3ebf27eccb583e by Vlad Zahorodnii. Committed on 09/02/2024 at 17:11. Pushed by vladz into branch 'master'. Introduce Spacer button Related: bug 438719 M +3 -0 src/decorationbutton.cpp M +4 -0 src/decorationdefines.h https://invent.kde.org/plasma/kdecoration/-/commit/4612e0f003a3b668a9bb733feb3ebf27eccb583e
Git commit 4e8f1bdfdac08505be1d8ca5110f0c7dd3a51eb6 by Vlad Zahorodnii. Committed on 09/02/2024 at 18:20. Pushed by vladz into branch 'master'. Bring back decoration spacer buttons They were lost during KDecoration 1 -> KDecoration 2 transition. Related: bug 438719 M +1 -0 src/decorations/settings.cpp M +15 -10 src/kcms/decoration/declarative-plugin/buttonsmodel.cpp M +10 -3 src/kcms/decoration/declarative-plugin/previewbutton.cpp M +3 -1 src/kcms/decoration/utils.cpp https://invent.kde.org/plasma/kwin/-/commit/4e8f1bdfdac08505be1d8ca5110f0c7dd3a51eb6