Adding "UseRecommends "false"; to synaptic.conf only fixed it for the next time I started Synaptic, then it was ignored again.
However, adding a new file to /etc/apt/apt.conf.d named for example "02recommend" with the content
APT "" { Install-Recommends "false"; };
disables the option permanentely and removes the tick in the preferences.
Adding "UseRecommends "false"; to synaptic.conf only fixed it for the next time I started Synaptic, then it was ignored again.
However, adding a new file to /etc/apt/apt.conf.d named for example "02recommend" with the content
APT "" { Recommends "false";
Install-
};
disables the option permanentely and removes the tick in the preferences.