# Saturation

Greetings to all. I ask for help. Did I understand correctly that the user_sat parameter does not change the saturation, in the sense that the saturate in HSL, but indicates the maximum change? So I can't change the saturation? In what situations and how should I change the user_sat?

## Forums:

### user_sat is used to set

user_sat is used to set sensor saturation (max possible) value. It is not related to HSL space

-- Alex Tutubalin @LibRaw LLC

### Thanks a lot. This is clear

Thanks a lot. This is clear now. I can change the maximum. Just I can't imagine why and where it can be needed.

### user_sat is documented way to

user_sat is documented way to change maximum with guarantee you do not break anything

(for example, if you'll change maximum value after open_file(), but before unpack() it can result into data error exceptions/warnings).

-- Alex Tutubalin @LibRaw LLC