Hi Hans, I run with my simplefonts module in two problems when I try to set the bodyfont, the regard math and fallback fonts and I was only to solve them by redefining of a few values. 1. I have to set the bodyfont at the same time when I set a individual font for serif, sans or mono. This works fine for the the three text style but not when I try to switch to a different math font, which is frozen with the first \setupbodyfont command and can only be changed when I the main fontclass (created with \registerfontclass in \definetypeface) and the style value for rm (I need the 'rm' style to allow e.g. ss as document style). Here is a example to illustrate the problem: \definetypeface[mainface][rm][serif][times][default] \setupbodyfont[mainface,ss,12pt] \definetypeface[mainface][ss][sans][helvetica][default] \definetypeface[mainface][tt][mono][courier][default] \definetypeface[mainface][mm][math][palatino][default] % comment/uncomment the following two lines to see how % the math font changes with/without these redefinitions \letvalueempty{@@tfmainfacedefault}% \undefinevalue{@f@st@rm}% \setupbodyfont[mainface,ss,12pt] %\definetypeface[mainface][mm][math][cambria][default] %\letvalueempty{@@tfmainfacedefault}% %\undefinevalue{@f@st@rm}% %\setupbodyfont[mainface,ss,12pt] \starttext text \rmtf regular \it italic \bf bold \bi bolditalic \sstf regular \it italic \bf bold \bi bolditalic \tttf regular \it italic \bf bold \bi bolditalic $$ c^2 = a^2 + b^2 $$ \stoptext 2. The fallback for the main style (i.e. \rmtf) is frozen too with the first \setupbodyfont line in the document with can be only reset when I undefine \newfontidentifier, a example for this is: \starttypescript [serif] [mainfont] \setups[font:fallback:serif] \definefontsynonym [Serif] [name:texgyrepagellaregular] [fallbacks=mainfont,features=default] \stoptypescript \definetypeface [mainfont] [rm] [serif] [mainfont] [default] \setupbodyfont[mainfont,rm] \definefontfallback [mainfont] [name:texgyretermesregular] [0x0065-0x0070] [force=yes] % The following line is necessary to enable the fallback font for the main % style after the bodyfont is set, if this isn't done the complete text % below is typeset in Pagella whereas e-p should be in Times \undefinevalue\newfontidentifier \setupbodyfont[mainfont,rm] \starttext abcdefghijkmnopqrstuvwxyz \stoptext I would prefer something documented (e.g. \setupbodyfont[reload,...]) which can be used to get the same effect as I did with my hacks because I like now my new font module, it's lot easier than direct method to set fallback fonts. TIA Wolfgang