# Downward Rightarrow for natural transformation, tikzcd

I am pretty sure this is out there on this site, but I did not find it after searching.

How to draw a downward

\Rightarrow

in a commutative tikzcddiagram?

• Try \documentclass{article} \usepackage{tikz-cd} \begin{document} \begin{tikzcd} X \arrow[d,Rightarrow]\\ Y \end{tikzcd} \end{document} and please make the last part of your question clearer. – user121799 Oct 19 '18 at 10:10
• Can you add an image, please to have a clear idea? – Sebastiano Oct 19 '18 at 11:28

Seems like many users do not really understand your second request. Even though my crystal ball got stolen, I am guessing that you are looking for \arrow[d,Rightarrow] and \arrow[d,dash].
\documentclass[fleqn]{article}
$\begin{tikzcd} X \arrow[d,Rightarrow] & A \arrow[d,dash]\\ Y & B \end{tikzcd}$