Reverse: Pressing this key allows the operator
to reverse the current cursor direction. It functions as follows:
The cursor is repositioned according to the current cursor direction.
When right-to-left, the cursor is placed at the current left boundary
location. When left-to-right, the cursor is placed at the current
right boundary location.
The cursor direction is then reversed; the Keyboard Layer you
get depends on the new cursor direction.
Insert mode is reset.
Close: By pressing this key, data entered
in one key direction is joined with data that was previously entered
in the opposite direction:
All embedded null characters are removed from the current line
(or field, if the field is contained on one line).
Joined text is moved to the right boundary of the field if the
field direction is right-to-left, or to the left boundary if the field
direction is left-to-right.
The remainder of the line (or the field, if contained on one line)
is padded with null characters.
The cursor direction is set to the field direction.
If the cursor direction is now left-to-right, the cursor is positioned
at the first null character to the right of the joined text. If the
cursor direction is now right-to-left, the cursor is positioned at
the first null character to the left of the joined text.