+ O_EDGE_INSERT_STAY
+ When inserting into a field up to the boundary position, option-
+ ally delay the scrolling, so that the last inserted character
+ remains visible, but advance the cursor to reflect the insertion.
+ This allows the form library to display the inserted character in
+ one-character fields as well as allowing the library to maintain
+ consistent state.
+
+ O_INPUT_FIELD
+ The <STRONG>set_max_field</STRONG> function checks for this extension, which allows
+ a dynamic field to shrink if the new limit is smaller than the
+ current field size.