Consider the following math mode notation: \bar{\Delta)}
Is there anyway I make this simpler. Say I want to type \bd and get \bar{\Delta)}. How can I do that?
Here my same proposal of the best user @marmot. You can create a specific short macro.
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath,amssymb}
\newcommand{\bd}{\bar{\Delta}}
\begin{document}
\[\bd\]
\end{document}
\newcommand{\bd}{\bar{\Delta)}}but really shouldn't. Use keyboard short cuts instead, your collaborators will appreciate it. – Jun 21 '19 at 21:23