BSYR230I Valid line commands for New MVS User Catalogs are: C-Create User Catalog, A-Add Alias to User Catalog, D-Display Data sets in User Catalog, U-Update User Catalog Name, V-View Aliases associated with the User Catalog.

Explanation
 This message is displayed when ? is entered in the line
command area to get help on valid line commands. The following line commands are valid in this line
command area: Enter C to create a new MVS user catalog. Enter A
to add an alias to the listed catalog. Enter D to view the aliases for the listed catalog. Enter U
to change the name of the entered user catalog. Enter V to view the aliases assigned to the catalog. 

User response
 None. This message is informational. 