ENABLE Reference Manual
 OPERATING COMMANDS
 VOLUME Command
 VOLUME Command
 The VOLUME command sets the default volume and subvolume for
 expansion of all file names. The syntax of the VOLUME command
 is:
 -----------------------------------------------------------------
 | |
 | VOLUME { $<volume> } |
 | { $<volume>.<subvolume> } |
 | { <subvolume> } |
 | |
 | <volume> |
 | |
 | is a GUARDIAN volume name. |
 | |
 | <subvolume> |
 | |
 | is a GUARDIAN subvolume name. |
 | |
 | The initial VOLUME setting is the volume and subvolume in |
 | effect when you start ENABLE. |
 | |
 -----------------------------------------------------------------
 Considerations
 If you omit $<volume>, ENABLE uses the current volume setting.
 If you omit <subvolume>, ENABLE uses the current subvolume
 setting.
 If you omit both, and the file from which the OBEYVOL command was
 read is not a disc file, ENABLE displays an error message and the
 VOLUME setting remains unchanged.
 A VOLUME command is equivalent to entering both an OBEYVOL and a
 CMDVOL command with the same specification. Note that this does
 not necessarily mean that the settings for OBEYVOL and CMDVOL
 would be identical following a VOLUME command. If, for example,
 the default value for OBEYVOL is:
 $v1.a
 and the default value for CMDVOL is:
 $v2.b
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