This text field contains a category value.  If  you  click  on  a
category in the list to the left, its value will appear here (its
name appears in the text field below).  If you wish to add a  new
category,  select  a new category value here, either by typing it
directly, or using the increment/decrement  arrow  buttons.   You
may  not  have  two  categories with the same value.  The name of
your category may be edited in the text field below.   Click  the
'Add Category' button to actually add the category.


