To write the lowercase xi and zeta, I imagine that I am looping around the horizontal bars in the corresponding uppercase letters, and they tend to come out app

To write the lowercase xi and zeta, I imagine that I am looping around the horizontal bars in the corresponding uppercase letters, and they tend to come out approximately right. I remember a Greek-born colleague writing the uppercase Omega as just an underlined letter O. I suppose that shape is probably the idea behind the flourishes in the typeset Omega.