Make current page link bold/highlighted

This is a great plugin. The one thing I cannot figure out how to do – even after reading the documentation – is how to style the widget so that the current page the user is on appears bold. The list of pages is fine, but there is no indication where the user is at any time relation to the other links. I have had no luck figuring out current_page_item.

This other support thread is most similar to what I am looking for, but none of the CSS posted there works for me at all: http://ww.wp.xz.cn/support/topic/css-styling-sub-menu-cant-work-out-3rd-level-pcc-styling?replies=1. I don’t need multilevel highlighting, just bold current page.

http://ww.wp.xz.cn/plugins/hierarchical-pages/