Creates a grob representing underlined text.
utextvpDynamic(label, x=.5, y=.5, default.units="npc",
just="centre", angle=0, name="utext")
A character value.
Numeric or unit value.
Units to use if location is not a unit.
Character vector indicating justification of text relative to its location.
Numeric angle of text (in degrees).
Character value.