The ERASE clause clears part of the line or the screen starting at the cursor
position.
General Format
Syntax Rules
The ERASE clause can be specified only for elementary items.
General Rules
When ERASE EOL is specified, blanking begins at the line and column coordinates
specified for the screen data element in whose description it is included
and continues through the end of the line.
When ERASE EOS is specified, blanking begins at the line and column coordinates
specified for the screen data element in whose description it is included
and continues through the end of the screen.
If neither the BLANK nor the ERASE clause is specified, only the particular
character positions corresponding to the screen data element are modified
when the element is displayed.