To review the Release Notes before the installation, you can retrieve the Release Notes from the KFORT031.A saveset with the OpenVMS BACKUP command. Alternatively, you can start the installation procedure, and then abort the installation when the Release Notes have been succesfully moved to the SYS$HELP directory.
At any time after that point of the installation, you can enter the following command to review the Release Notes:
$ TYPE SYS$HELP:KFORT031_RELEASE_NOTES.TXT