Task areas
 -- These areas include the associated resources, the task control element (TCE), and the dispatch control element (DCE) for the issuing task. The displayed information is formatted with headers.
System areas
 – These areas include all tasks and CA IDMS internal control blocks. Task areas are not itemized separately. The displayed information is formatted with headers.
Specified locations in memory 
-- These areas include one or more memory areas that are requested by location and length. The displayed information
is not
formatted with headers.

►►─── SNAP ─┬──────────────────┬─┬──────────┬─────────────────────────────────►
            └─ TITLE is 
title ─┘ ├─ ALL ────┤
                                 ├─ SYSTEM ─┤
                                 └─ TASK ───┘

 ►─────┬───────────────────────────────────────────────────────────┬─ . ──────►◄
       │ ┌───────────────────────────────────────────────────────┐ │
       └─▼─ FROM 
begin-snap-location ─┬─ TO 
end-snap-location ─┬─┴─┘
                                      └─ LENGTH 
snap-length ───┘

TITLE is 
title
Specifies the title to print at the beginning of each snap page. Specify the symbolic name of a user-defined field that contains the title. The title must contain 134 characters. The first character is reserved for use by CA IDMS, and the second character must be a valid ASA carriage control character (blank, 0, 1, +, or -).
ALL
Writes a snap of both task and system areas. The areas that are associated with the issuing task are formatted separately from the system areas. (Task areas are also included with the system areas but are not itemized by task.)
SYSTEM
Writes a snap of system areas.
TASK
Writes a snap of task areas.
FROM 
begin-snap-location
 
Writes a snap of the specified memory location. Specify the symbolic name of a user-defined field indicating the starting location of the area to be snapped.
TO 
end-snap-location
Specifies the end of the area to snap. Specify the symbolic name of a user-defined dummy byte field or a field containing a data item that is not associated with the requested area.
LENGTH 
snap-length
Defines the length in bytes of the area to include in the snap. Specify the symbolic name of a user-defined field that contains the length of the data area, or the length itself expressed as a numeric constant. 
If
snap-length
is greater than 100, some COBOL compilers can produce errors. In this case, use a symbolic name that contains the length, or use the FROM/TO verb form.

SNAP TITLE IS SNAP-TITLE
  FROM WS-START TO WS-END.