You can't I have never used a serrated section and they always put them in the worst place, at the base, where I do fine cutting, peeling etc. I find them utterly useless and an annoyance. Despite having it stated in large capitol print on my old brochure that I do NOT use serrated edges on my knives I was still inundated with requests for them. Apparently they appeal to some demographic out there. Hope this helps.