New posts in Catcodes

Colorize material in math-mode subscript and superscripts

Save and restore the makeatletter/makeatother state

Getting the catcode of a character assigned to a control sequence by \let

Macros that contain catcode 1 and 2

How is \catcode handled?

Why is & special outside of tabular environments?

Make Characters Active via Macro in Math Mode

Turn * into thin space for clearer math spacing

Splitting macros to individual tokens/characters, with catcode (to debug conditionals)?

Typesetting hashtags with natural syntax