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Edited the Commutative Diagrams section for more clarity
Otherwise, positioning will not work (figure will not be centered). See [http://www.ntg.nl/pipermail/ntg-context/2007/023177.html this post] by Aditya Mahajan for explanation.
== Example for commutative diagrams ==
Hans ร
berg wrote to the mailing list on 2016-10-06:
There is a tikz-cd package at CTAN: https://www.ctan.org/tex-archive/graphics/pgf/contrib/tikz-cd?lang=en
In order to use it, download the the file <code>tikzlibrarycd.code.tex</code> and put it in <code>CONTEXT_HOME/tex/texmf-modules/tex/generic/pgf/libraries/</code>. Then run
<pre>
mtxrun --generate
context --make
</pre>
You should now be able to use tikz-cd.
Makes sure to follow the translation rules in the manual for ConTeXt. In addition to that, it seems that you have to replace the apostrophe with "below".
The first few examples in the manual, which compiled with latest ConTeXt:
<texcode>
\usemodule[tikz]
\usetikzlibrary[cd]
\starttext
\starttikzcd
A \arrow{rd} \arrow{r}{๐} \NC B \NR
\NC C
\stoptikzcd
\starttikzcd
A \arrow[r, "\phi"] \arrow[d, red]
\NC B \arrow[d, "\psi" red] \NR
C \arrow[r, red, "\eta" blue]
\NC D
\stoptikzcd
\starttikzcd
A \arrow[r, "\phi" near start, "\psi" below, "\eta" near end] \NC B
\stoptikzcd
\starttikzcd
T
\arrow[drr, bend left, "x"]
\arrow[ddr, bend right, "y"]
\arrow[dr, dotted, "{(x,y)}" description] \NC \NC \NR
\NC X \times_Z Y \arrow[r, "p"] \arrow[d, "q"]
\NC X \arrow[d, "f"] \NR
\NC Y \arrow[r, "g"] \NC Z
\stoptikzcd
\starttikzcd[column sep=tiny]
\NC \pi_1(U_1) \ar[dr] \ar[drr, "j_1", bend left=20]
\NC
\NC[1.5em] \NR
\pi_1(U_1\cap U_2) \ar[ur, "i_1"] \ar[dr, "i_2" below]
\NC
\NC \pi_1(U_1) \ast_{ \pi_1(U_1\cap U_2)} \pi_1(U_2) \ar[r, dashed, "\simeq"]
\NC \pi_1(X) \NR
\NC \pi_1(U_2) \ar[ur]\ar[urr, "j_2" below, bend right=20]
\NC
\NC
\stoptikzcd
\stoptext
</texcode>
== See also ==
