1. Is it correct that header, background and for example the pages menu structure needs to be redone once a new twentytwelve child was installed?
2. I am just not sure that what I see is what it should be. There is a line in the 'current theme' info that says: This child theme requires its parent theme, Twenty Twelve.
Is this correct or does it refer to some failure?
3. Assuming the child theme was imported correctly. Where do I actually edit the coding to make sure not to lose anything with a next update. I guess I copy from the original 2012 style.css, paste this into the 2012 child style.css?
So after a while the child style.css will grow?
For your information. Since I wasn't sure things went okay I made a child theme in two occassions and two different ways.
1st: based on the wp codex child theme info and ftp
2nd: by using the One Click Child Theme plugin.
Both had the same effect in terms of my 3 questions above.
Am I on the right path?