 So you just don't understand all polygons. Not a problem. It literally just applies whatever action you picked to every available face on your object. So if your action is mask, it's gonna mask everything. If your action is crease, it's gonna crease everything. If you have creases on your object already and you wanna remove them, but you just don't wanna spend time manually finding them, just set action to uncrease all polygons and it will uncrease everything automatically in no time. Hope that helps. And as always, hope you have a fantastic day. And I'll see you around.