129     def actual(self, option=None, displayof=None):  argument
132         if displayof:
133             args = ('-displayof', displayof)
156     def measure(self, text, displayof=None):  argument
159         if displayof:
160             args = ('-displayof', displayof, text)
169         displayof = kw.pop('displayof', None)
170         if displayof:
171             args = ('-displayof', displayof)
184 def families(root=None, displayof=None):  argument
189     if displayof:
190         args = ('-displayof', displayof)
223     print(f.metrics(displayof=root))
226     print(f.measure("hello"), f.metrics("linespace", displayof=root))