The following list shows the valid CompressionType settings:
| Setting | Description |
| 1 | No compression |
| 2 | Group3(1D) |
| 3 | Group3(Modified Huffman) |
| 4 | PackBits |
| 5 | Group4(2D) |
| 6 | JPEG |
| 7 | Reserved |
| 8 | Group3(2D) (read only) |
| 9 | LZW |
AWD and BMP files must be saved using a CompressionType setting of 1.
Note: AWD is not available with Imaging for Windows NT 4.0.