Thanks. I went through lesson 1, navigating the editor, and followed the instructions , but when it came to clicking the "apply" button after making the changes.... no joy. Only the cancel button was clickable. That's the problem wioth parrotting instructions without understanding what's happening. Just a slight difference in environment can upset everything. Also got numerous dialogues that were not mentioned in the guide, so I just clicked "yes", as it was not clear what they wanted.
