You have various options in changing the conditions in the IF, THEN and
ELSE parts of a rule.

To delete a condition press <D> and you will be prompted for the number of
the condition to delete.

To add a condition press <A> and you will have the standard menu for adding
new conditions, the same as when creating a new rule.

If the qualifier displayed is correct but the values assigned to it are
wrong, press <C> and enter the number of the condition to change.  You will
have the qualifier and all its values displayed in the right window.  You
can then select the correct values or cancel that qualifier by pressing
<ESC> or just <ENTER>. If you select <C> and enter the line number of a
mathematical expression, the program will put you in the math mode for the
input of a new mathematical expression.  The old variable or expression will
be displayed for you to edit.

You can change the order of the conditions by pressing <R>.  You will be
asked what condition to move and what number in the list it should be.  You
can only move one condition at a time.

When the conditions are the way you want them press just <ENTER> and the
full rule will be displayed, as you have modified it.
