Textbook has frequent boxes that include a title > subtitle, which are separated by a graphic mark, resembling an arrowhead or closing angle bracket. I also notice that this mark, and the subtitle are in bold. So, after you view the image, please correct me if I'm wrong here. I used a bold closing angle bracket because that's what it resembles, but it looks like some kind of an arrowhead to me, and I am having problems locating the proper symbol to use. Thanks!
The arrow is not an arrow... It's just a visual separator. We both agree (the other person I asked and me) that we would use bold on "on your own" (to show distinction between that and the other part of the heading) and not include the arrow symbol at all.