Hi,
I'm sorry but I didn't necessarily follow all the threads. I use to make my graphics Metapost or Metafun, but I also sometimes use TiKz. This file compiles with context but not with lmtx because the modules are not recognized. I am willing to use only lmtx which seems to be the future of ConteXt, but how do I do that ?
Thank you.

Fabrice

\usemodule[tikz]
\usetikzlibrary[calc]

\starttext

\startlinecorrection[blank]
  \startmidaligned
    \starttikzpicture
       \draw[fill=orange!30e,draw=orange] (0,0) rectangle (5,5);
     \stoptikzpicture
     \stopmidaligned
    \stoplinecorrection

\stoptext