I don't really even know how to present this question, but here is my best shot! :-)
I notice when I have a bible opened in a pane (for example), on the right side of the text there are small horizontal lines, almost just a "dash." Some are single lines, some are double, some are light, and some are bold. When I place the cursor over these lines, it opens a small information pop-up window.
Can someone explain what this is and how it relates to the passage and or commentary that I have opened? Thanks.
Steve