Hi, the Consolas font produces proportional spaces even with “features=none”. \starttypescript [mono] [consolas] \setups[font:fallback:mono] \definefontsynonym [Mono] [file:consolas] [features=none] \definefontsynonym [MonoBold] [file:consolasbold] [features=none] \definefontsynonym [MonoItalic] [file:consolasitalic] [features=none] \definefontsynonym [MonoBoldItalic] [file:consolasbolditalic] [features=none] \stoptypescript \definetypeface [mainface] [rm] [serif] [modern] [default] \definetypeface [mainface] [tt] [mono] [consolas] [default] %\definetypeface [mainface] [tt] [mono] [modern] [default] \setupbodyfont[mainface] \starttext \starttyping a b cd x y z \stoptyping \stoptext Wolfgang