sgm for Debian STLWRT-ian GTK Modules (sgm) provides a set of gtk3 modifications that restore some functionality that was removed by upstream gtk3. # gtk3-automnemonics To enable the underscores everywhere, add to your gtk3 theme settings.ini file: [Settings] gtk-auto-mnemonics = 0 gtk-modules = sgm-flexible-mnemonics This package already includes /etc/X11/Xsession.d/53gtk3-automnemonics that sets the environment variable GTK_MODULES to include "sgm-flexible-mnemonics." -- B. Stack Thu, 25 Feb 2021 07:53:26 -0500