Labelling a dotted arrow in tikz

Question

I wrote the following code, trying to get a commuting triangle with one of the arrows being dotted.

\begin{tikzcd}[column sep=1.5em]
 S \ar{dr}{f} \ar{rr}{m} && Y\arrow[dl,dotted]{g} \\
&F
\end{tikzcd}

But the dotted arrow doesn't display the label g as I tried to make things.

What am I doing wrong here?

Answer 1

You can use almost two same options as codes:

First 1.

\documentclass[a4paper,12pt]{article}

\usepackage{tikz-cd}
\usepackage{mathtools}

\begin{document}
\begin{tikzcd}[column sep=1.5em]
 S \ar{dr}{f} \ar{rr}{m} && Y\arrow[dl,dotted, "g"'] \\
&F
\end{tikzcd}
\end{document}

Second 2.

\documentclass[a4paper,12pt]{article}

\usepackage{tikz-cd}
\usepackage{mathtools}

\begin{document}
\begin{tikzcd}[column sep=1.5em]
 S \ar{dr}{f} \ar{rr}{m} && Y\arrow[dl,dotted, swap, "g"] \\
&F
\end{tikzcd}
\end{document}