I remembered where I saw indented sub-lists – it was section 4 of part 2 of the step by step guide. It says there that indented sub-lists are the default but when I created the test child forum mentioned above it appeared left-justified not indented. I think indented looks better. Why shouldn’t the default be working for me?
Thank you – good to know that I haven’t done something wrong. Having been encouraged to dig deeper I now believe that the sub-lists I noticed somewhere must have been child forums of a parent forum.
I’ve created a test child forum and it does appear beneath the parent forum on the main page.