The Hue-Chroma filter is 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 commands. You can find its description in Section 8.1.1, “Colors Common Features”.
The slider and the small arrow buttons allow you to select a hue in the color circle (-180°, 180°).
“Chroma” is the purity of the color. Moving this slider makes colors more or less pure.
This slider and the small arrow buttons allow you to select a value (luminosity): -100, 100.
These are common features described in Section 8.1.1, “Colors Common Features”.