I want to show an arrow for an isomorphism in a commutative diagram. Currently I'm using
\ar[rr, dotted, "\textasciitilde", "\funcname{f}''"'] but there is two much vertical space between the Tilde and the arrow. What is the proper way to do this in tikz-cd?
I didn't quite understand at first what you wanted to achieve. So here's the final version (thanks to @egreg for the help).
\documentclass[margin=10pt]{standalone} \usepackage{tikz-cd} \begin{document} \begin{tikzcd} A \ar[r, dotted, "\sim", "f''"'] & B \end{tikzcd} \end{document} I think what you're looking for, is the property "inner sep". In the following picture, the first arrow is generated with \ar[r, "\sim"], while the second is generated with \ar[r, "\sim" inner sep=.3mm].
\ar[d, "\sim" {rotate=90, anchor=north}]. This was done without tikz-cd.
\documentclass{article} \usepackage[utf8]{inputenc} \usepackage{amsmath} \begin{document} $\xrightarrow{\sim}$ \end{document} which gives
For a dashed arrow, like you wanted,
\documentclass{article} \usepackage[utf8]{inputenc} \usepackage{amsmath} \usepackage{MnSymbol} \begin{document} $\overset{\sim}{\dashrightarrow}$ \end{document} which gives
I found another question that had other similar shapes, but I lost it, so I'm still looking for it again. Alenanno's answer has a great tikz-cd version. I simply thought it would be useful to point out what a non-tikz-cd solution would be. I'm working on making the dotted arrow a little longer, as it's kind of short.
Hope this helps.
