In order to experiment with the modification of a theme, I have duplicated one of the existing themes, renamed it, and uploaded it to the wp-content/themes/ directory.
I am able to edit the CSS file and add new images to this new theme.
The problem is, I am having trouble getting the new theme to display correctly in the Dashboard. If I edit the comment headers in the style.css file, the details disappear from the "Manage Themes" page in the Dashboard. I am attempting to follow the instructions contained in this article:
Am I missing something? Do I need to configure another file so the duplicate will be recognized?