hi
everything is perfect for me except the wire
for some reason it doesn't show the wires of mesh when I activate it
It's in the weight paint context overlays now.

***Edit*** just realized this is the 4.2 version that Wayne is using. He covers these setting in https://cgcookie.com/lessons/07-weight-painting-overview around 9:20 and points out that he prefers the wire overlay that Martin pointed to.
"I noticed the brush options have changed in Blender 4.5—you can now choose between Paint, Blur, and Smear. I’ve been using Paint, and it works well. But your Add button isn’t there anymore."
"Yes, I think that’s the right one—I didn’t notice it before. Haha, switching to the other version might be a good idea, since quite a few things have changed in Blender 4.5 and I’m struggling a bit. But everything up to this point was fine. Thanks for your help! 😊