pr-update-mode-line

pr-update-mode-line is an alias for `force-mode-line-update' in `printing.el'.

(pr-update-mode-line &optional ALL)

Force redisplay of the current buffer's mode line and header line.
With optional non-nil ALL, force redisplay of all mode lines and
header lines. This function also forces recomputation of the
menu bar menus and the frame title.