Dear Hans, now, in luatex 1.05, that the primes are "constructed" in new manner, I wonder if there is a way to specify in a goodie file the kerning between characters, in particular primes and the left parenthesis? I tried kernpairs = { [0x2032] = {[0x0028] = -1000, }, -- prime and ( }, but that does not seem to have any effect. The pre-1.05 modification dimensions = { default = { [0x2044] = { xoffset = 275, width = 600 }, [0x2032] = { xoffset = 50, width = 290 }, -- prime [0x2033] = { xoffset = 50, width = 690 }, -- double prime [0x2034] = { xoffset = 50, width = 1090}, -- triple prime [0x2057] = { xoffset = 50, width = 1490}, -- quadruple prime }, }, (which is a non-optimal way of solving this issue since it has side effects) does not change anything anymore. So, is there now a way to do this cleanly now that the mechanism is changed? /Mikael