Add UNDO tablespace autoextend tips

Hello,   I need to alter by UNDO tablespace tpo make it autoextend on.  How do I change my UNDO tablespace to allow for autoextend? Show Undo Tablespace in Oracle Database scripts ; CREATE UNDO TABLESPACE UNDOTBS2 DATAFILE ‘+ XDSLBAUNDATA’ SIZE 33554416K AUTOEXTEND OFF, ‘+ XDSLBAUNDATA’ SIZE 33554416K AUTOEXTEND OFF, ‘+ XDSLBAUNDATA’ SIZE 33554416K AUTOEXTEND OFF, ‘+ […]