Unclear how to use the Palette->preset

Hello, even if I read its (pretty short) help page I don’t understand how the Preset comp works.
I created a component with some custom parameters. I put this Preset inside it.
I checked the “Install…” flag. The I created two different preset (changing its custom pars).
But, when I switch the presets nothing change, even if I press Recall…
Where I am wrong?

BTW, is there a simple presets system which works with UI elements like sliders…buttons etc?