Hi Hans, hi guys, thanks for the explanation! Does this mean that each time I want to change the font size of the text (e.g. for a floating object or framed text) I must do this manually for mathematics? or is there a way to adopt the font size of the text to mathematics? see below for an example what I mean. Here, I used definetextbackground but the effect remains in floating objects as well. I tried different font styles and different font types, too. Armin ********** EXAMPLE \definealternativestyle[ImportantStyle][{\definedfont[Kurier-Bold at 24pt]}] \definetextbackground[zhu] [location=paragraph, background=color,backgroundcolor=orange, leftoffset=0.5\bodyfontsize,rightoffset=.5\bodyfontsize, topoffset=.5\bodyfontsize,bottomoffset=.5\bodyfontsize, style=ImportantStyle, frame=off] \startsetups important:start \starttextbackground[zhu] \stopsetups \startsetups important:stop \endgraf \stoptextbackground \stopsetups \definestartstop [important] [before=\setups{important:start}, after=\setups{important:stop}] \starttext this looks normal $x$. \startimportant this uses the environment definetextbackground \mathematics{x}. \stopimportant \stoptext ****** END EXAMPLE ___________________________________________________________ WEB.DE DSL ab 19,99 Euro/Monat. Bis zu 150,- Euro Startguthaben und 50,- Euro Geldprämie inklusive! https://freundschaftswerbung.web.de