If the next screen has the number 0 (either defined statically or
set dynamically by SET
SCREEN 0), processing in CALL mode continues after
SCREEN statement. Otherwise, you branch to the
transaction selection screen.
If the next screen is specified dynamically, you can use the
short form " LEAVE TO
SCREEN scr. " instead of a combination of the "SET
SCREEN scr." and "LEAVE SCREEN." commands.