I want to take an existing theme and tweak it to features I prefer. I took Classic and created a new theme. I have successfully imported it to other files. So I thought I knew what I was doing.
I started with Retro. I wanted to save it as a new theme that I would tweak. But the only option is to RENAME it. So I thought that I needed to tweak some changes. Then the option would appear. No. I can save the changes to the theme or rename it.