Default keys 1 - Steel, 2 - Silver sword. Two at once will not work, this is not Gothic 3 and not Skyrim. Maybe there is some kind of mod - look on the "Nexus"
umdrgmu So in the game it is provided that when a fight with people is steel, a fight with mutants is silver, especially since there is an option in the settings Geralt takes out swords automatically when the battle starts.
