(bit field)
  Unused: boolean
  Unused: boolean
  Unused: boolean
  Unused: boolean
  Unused: boolean
  Unused: boolean
  Unused: boolean
  Show Thumbnail Info w/Key? : boolean
Show Info Key (57=CapsLock): 1-byte integer (decimal)
Compressor (jpeg, rpza, rle , raw ): 4-byte integer (char)
Compressor criteria (any=0, speed=-1, fidelity=-2, compression=-3): 4-byte integer (decimal)
Compressor Quality (Min=$000, Norm=$200, Max=$3FF, LL?=$400?): 4-byte integer (hex)
Compressor Depth: 2-byte integer (decimal)