Phone Number Search

There’s another problem, or I just have it. If I’m looking for a number and I have 255 entries of it, it’s hard to set it by turning it at the wheel. How is it faster, or did I miss something in the user manual. No goes to speak up, but that’s not what I want, there is a search function e.g. after the letters like A like Antara or B like Butzelman etc. ?? MfG Hans-Jürgen