Commands - Overleaf, Online LaTeX Editor
Commands with optional arguments - Wiki
macros - How can I differentiate in \newcommand between an unused optional argument and an empty one? - TeX - LaTeX Stack Exchange
cross referencing - How to define optional second argument for macro? - TeX - LaTeX Stack Exchange
How to interpret the syntax of \newcommand in latex in comparison with the command it defines - Stack Overflow
LaTeX & Macros: Macros with Optional Arguments - DEV Community
Macros
Support OPTIONAL ARGUMENT in user defined macro by \newcommand · Issue #2228 · KaTeX/KaTeX · GitHub
How to use \newcommand in LaTeX?
Commands - Overleaf, Çevrimiçi LaTeX Editörü
Advanced latex | PPT
Macros: Difficulty with optional arguments in newcommand
macros - naming argument and optional-argument for \def, \newcommand and newenvironment - TeX - LaTeX Stack Exchange
How TeX macros actually work: Part 4 - Overleaf, Online LaTeX Editor
8. Defining Commands
How to check for optional arguments of macro and modify expansion accordingly? · KaTeX KaTeX · Discussion #3520 · GitHub
Make LaTeX easier with custom commands – Water Programming: A Collaborative Research Blog
LaTeX Tutorial-Page Setup
The optparams package
spacing - How does xparse's routine for looking for an optional argument do the trick of preserving space-tokens in case no optional argument is present? - TeX - LaTeX Stack Exchange
Macros: Optional argument implementation in Newcommand using ifthenelse statement
Make LaTeX easier with custom commands – Water Programming: A Collaborative Research Blog
macros - \newcommand: Using one parameter as the default for the other - TeX - LaTeX Stack Exchange
How to use \newcommand in LaTeX?
Autocompletion of locally defined commands assumes wrong number of arguments · Issue #1322 · SublimeText/LaTeXTools · GitHub
