DEC VAX 4000 300 Manual page 124

For example, suppose you do not need the VMS Version 5.0 MAIL utility
and you run VMSTAILOR to remove those files. Later on, if you decide
you want to use mail, you can run VMSTAILOR to return the MAIL files
to the system disk. You then apply any VMS upgrade or update that has
occurred since Version 5.0 that affected the MAIL utility. To remove VMS
DECwindows files from the system disk, enter the following command:
$ RUN SYS$UPDATE:DECW$TAILOR
Return
The DECW$TAILOR program works just like the VMSTAILOR program.
D–2 VAX 4000 Model 300 Operation