Hi, the negative values for \startnarrower don’t work because braces in the definition are missing. -\installnarrowermethod-\v!left {\global\advance\s_spac_narrower_left -\narrowerparameter\c!left \relax} -\installnarrowermethod-\v!middle{\global\advance\s_spac_narrower_mid -\narrowerparameter\c!middle\relax} -\installnarrowermethod-\v!right {\global\advance\s_spac_narrower_right-\narrowerparameter\c!right \relax} +\installnarrowermethod{-\v!left }{\global\advance\s_spac_narrower_left -\narrowerparameter\c!left \relax} +\installnarrowermethod{-\v!middle}{\global\advance\s_spac_narrower_mid -\narrowerparameter\c!middle\relax} +\installnarrowermethod{-\v!right }{\global\advance\s_spac_narrower_right-\narrowerparameter\c!right \relax} Wolfgang