Casio IT-2000W Technical Reference Manual page 71

Key Operation
8 key
2 key
RET key
CLR key
1 key
0 key
Others
Operations with the touch panel are not permitted.
Increases the RAM disk size.
Decreases the RAM disk size.
Confirms the currently selected RAM disk size and exits this
operation.
Cancels the currently selected RAM disk size.
Formats the RAM disk (Format confirmation screen).
Aborts formatting of the RAM disk.
Invalid.
71
Function