Am 14.01.2021 um 14:58 schrieb Hans Hagen
: can you test with (in cont-new.mkxl)
\def\spac_narrower_start_apply#1% {\narrowerparameter\c!before \global\s_spac_narrower_left \zeropoint \global\s_spac_narrower_right \zeropoint \global\s_spac_narrower_middle\zeropoint \edef\askednarrower{#1}% \ifx\askednarrower\v!reverse \ifconditional\s_spac_narrower_last_swap \frozen\leftskip \s_spac_narrower_right_last \frozen\rightskip\s_spac_narrower_left_last \setfalse\s_spac_narrower_last_swap \else \frozen\leftskip \s_spac_narrower_left_last \frozen\rightskip\s_spac_narrower_right_last \settrue\s_spac_narrower_last_swap \fi \else \normalexpanded{\processcommalistwithparameters[\askednarrower]}\spac_narrower_initialize \frozen\advance\leftskip \dimexpr\s_spac_narrower_left +\s_spac_narrower_middle\relax \frozen\advance\rightskip\dimexpr\s_spac_narrower_right+\s_spac_narrower_middle\relax \fi \seteffectivehsize}
Yes, that works with LMTX, thank you! MkIV still fails, but cont-new.mkxl is LMTX only, I guess? Hraban