- cli_unicode_option: whether the- cli.unicodeoption is set and its
value. See- is_utf8_output().
 
- symbol_charset: the selected character set for symbol, UTF-8,
Windows, or ASCII.
 
- console_utf8: whether the console supports UTF-8. See- base::l10n_info().
 
- latex_active: whether we are inside knitr, creating a LaTeX
document.
 
- num_colors: number of ANSI colors. See- num_ansi_colors().
 
- console_with: detected console width.