.OUTPUT FILE: TST002
[Enter the name of the output file.]
.ALTER (A)BOVE THRESHOLD, (B)ELOW, OR (C) BOTH SIDES (A/B/C): A
[Option 'A' : Replaces all values greater than the specified
threshold with the fixup density vlaue.
Option 'B' : Replaces all values smaller than the specified
threshold with the fixup density value.
Option 'C' : Replaces all values smaller than the lower
threshold or greater than the upper
threshold with the fixup density value.