palettes.print_symbol:
Character string setting the symbol used for colour previews. See
list_colour_symbols() for a list of symbol choices. Defaults to
"circle_small". Set to FALSE to disable printing symbols.
palettes.print_hex:
Logical setting whether to print hex codes in colour previews. Defaults to
TRUE.
palettes.print_alpha:
Logical setting whether to print the hex code alpha channel in colour
previews. Defaults to FALSE. Colours without an alpha channel will be
assumed to be full opacity.
palettes.print_sep:
Character string to separate colours by in colour previews. Defaults to "".
palettes.print_width:
Integer setting the maximum number of colours on a line in colour previews.
Defaults to 1.
palettes.print_index:
Logical setting whether to print the index of the first colour on each line
in colour previews. Defaults to FALSE.