The label command creates a new window (given by the
pathName argument) and makes it into a label widget.
options, described above, may be specified on the command line
or in the option database
to configure aspects of the label such as its colors, font,
text, and initial relief. The label command returns its
pathName argument. At the time this command is invoked,
there must not exist a window named pathName, but
pathName's parent must exist.
A label is a widget
that displays a textual string or bitmap.
The label can be manipulated in a few simple ways, such as
changing its relief or text, using the commands described below.