6c6,14
< -# # Compression level, with # being any value from 1 to 12
---
> -1 # Compression level 1
> -2 # Compression level 2
> -3 # Compression level 3
> -4 # Compression level 4
> -5 # Compression level 5
> -6 # Compression level 6
> -7 # Compression level 7
> -8 # Compression level 8
> -9 # Compression level 9