This application selects by label a
graphics-database picture of a
specified device. If such a picture is found then it becomes the
current picture on exit, otherwise the input picture remains
current. Labels in the database are stored in the case supplied
when they were created. However, the comparisons of the label you
supply with the labels in the database are made in uppercase, and
leading spaces are ignored.
Should the label not be found the current picture is unchanged.