After Descr in the meta-menu, Jinx shows the descriptor-menu.
It presents commands which allow you to change the attributes
(fieldnames and constraint patterns) of the columns in the current database.
The data part of the screen will show the fieldnames
and constraint patterns of the descriptor.
The current fieldname is indicated by a `>' in the first column.
Move to the next (previous) fieldname with 
(
).
You can leave the descriptor-menu with finish. With TAB (or exit) you can abandon all modifications.
If you modify the descriptor, the current database will be made nameless because the descriptor on disk (if any) is not in accordance with the descriptor of the current database.