Dear Fabrice, The following code is working in my mac. I tried your first code and it is working after adding \setupinteraction[]. Since I didn’t use ‘rsteps’ module, I could’t test the second code. My ConTeXt version is as following. ConTeXt ver: 2014.12.21 22:25 MKIV beta fmt: 2014.12.26 int: english/english \setupinteraction[state=start] \setupcolors[state=start] \usemodule[pre-60] \setuppapersize[S4][S4] \starttext \StartSteps \startformula \startalign \NC x^2 + y^2 \NC = z^2 \NR \FlushStep \NC x^2 + y^2 \NC = z^2 \NR \FlushStep \stopalign\stopformula \StopSteps \stoptext I hope that this helps. Best regards, Dalyoung