Your master password can be used to access any domain in your VMS package; it is not associated with any specific domain. You can use the "change master password" link to change it.
To change your master password, use the three textboxes provided to enter the current password, and the new one you want to use twice for confirmation. Click "apply" or "ok" to save the change.
Clicking "cancel" aborts any unsaved changes, and returns you to the VMS settings main options menu.