Comment 2 for bug 992768

Attempted to correct this problem by editing org.gnome.desktop.wm.preferences.gschema.xml and recompiling. For action-middle-click-titlebar this more-or-less works. The schema compiler requires that an alias not be the same as its target, so it is necessary to use an alias that is only similar to the target, e.g., "Minimize" for "minimize". (Actually, only "Minimize", "Menu", "Lower", and "None" work as aliases for the obvious targets; any other spelling drops back to the default button binding.)

Adding additional aliases for action-double-click-titlebar and action-right-click-titlebar results in the Value menus for those keys incorporating the additional aliases, which can be selected in dconf-editor and are remembered, but those actions use their defaults instead of the selected option.

Removing the <aliases> section for each of the ...-click-titlebar entries results in a menu containing all the defined actions, but only the single-word values actually work; all the "toggle-..." values perform the default action for the <key>.

The descriptions are clearly wrong in mentioning "shade" as a possible value; that is not a target recognized by the compiler.