I define a crossed-out arrow because I can’t find a predefined one.
I find out how to add PDF bookmarks that don’t include forbidden tokens.
I describe how to define new commands, how to override existing commands and how to define a back-up command.
I make note of the gb4e and cgloss packages used for linguistics.
I show how to fix a mysterious-sounding error.
I describe how to customise numbering in enumerated lists.
I show how to merge columns in tables.