Add minimize and maximize buttons in Debian 8

In previous versions I could do this with gsettings set org.gnome.shell.overrides button-layout close,minimize,maximize: but now I get error no such key "button-layout" In GUI there is no button-layout in dconf-editor

So how can I add maximize and minimize buttons in Debian 8?

I was looking for the same and shortly after reading this question I found the solution for my setup (Debian 8, Gnome-Flashback): The relevant key is in org.gnome.desktop.wm.preferences, "button-layout". Edited with dconf-editor from "appmenu:close" to "appmenu:minimize,maximize,close" and the buttons are back :-)

Regards, Joachim

Utilize

For window buttons, I use Preference > Windows and have just the "Close" button on left side of the window. This fails for ALL GNOME applications, like Nautilus, Calculator, Gedit . .

or Gnome-shell and use the tweak-tool.