When you click on the link to view your journal entry, you will see the entry with all of its comments. The title bar will have a blue background for unscreened comments and a grey background for screened comments.
It occured to me that although this is the case with S1 styles, this is not going to be true for S2 styles. Unfortunately, I can't think of a good way to change this (particularly since I don't actually use S2). But I thought I'd point it out.