These functions are reexported as tibble::num() and tibble::set_num_opts().

num(
  x,
  ...,
  sigfig = NULL,
  digits = NULL,
  label = NULL,
  scale = NULL,
  notation = c("fit", "dec", "sci", "eng", "si"),
  fixed_exponent = NULL,
  extra_sigfig = NULL
)

set_num_opts(
  x,
  ...,
  sigfig = NULL,
  digits = NULL,
  label = NULL,
  scale = NULL,
  notation = c("fit", "dec", "sci", "eng", "si"),
  fixed_exponent = NULL,
  extra_sigfig = NULL
)