Hans, this sample comes from Sylvain’s message: %~ \definefontfeature[ef1][effect={width=1.0}] \definefontfeature[ef2][effect={width=}] \definefontfamily[face1][rm][gabriola] [features={default, ef1}] \definefontfamily[face2][rm][gabriola] [features={default, ef2}] \starttext \switchtobodyfont[face1]\dorecurse{100}{a b c } \switchtobodyfont[face2]\dorecurse{100}{a b c } \switchtobodyfont[palatino]\dorecurse{100}{a b c } \stoptext \setupbodyfont[palatino] or \switchtobodyfont[palatino] don’t seem to work at all. Results are different if feature ef1 is defined or not. With all features defined, paragraph width is wrong using "effect={width=1.0}". Could you check this? Many thanks for your help, Pablo -- http://www.ousia.tk