Another way to modify saturation. Clear explanations about chroma and saturation can be found at https://ninedegreesbelow.com/photography/changing-saturation-using-lch-chroma.html
「Presets」 are a common feature for several Colors command. You can find its description in 「「色」メニューのあらまし」.
This option gives more or less saturation.
These are common features described in 「「色」メニューのあらまし」.