Leaning the mixture.
How do you lean the mixture properly? I mean I know how to lean it in a straight level flight for best performance, so this question is more about climb/descent. I always read that during climb and descent you use rich mixture. But what if I wanted to climb to 10,000 feet. Can I start leaning it off during the climb (after 3,000 feet)? And what about a descent from 10,000 feet; rich mixture? (ofc with carb heat) before starting the descent?
Thanks for your expert advice.