[C]ould you please explain some of the data in the Help | About This Resource window?
How you use the information under datatypes?
So, “Jn 3:16” might mark a particular location within a Bible, or it might be used to refer to that location. A single resource can have both locations and references in the same datatype. Think of a dictionary arranged by Strong’s number: Each entry will have its location marked to a particular Strong’s number, but may also contain see also references to other Strong’s number entries in the same resource.
When a resource uses a datatype to mark locations, we say that resource is a keylink target for that datatype. That means that you can jump into the resource at any random spot that is defined by that datatype. On the other hand, when a resource uses a datatype to mark a reference (either to itself or to another resource), the reference text is usually highlighted, and you can click on it to open the corresponding location. That much is pretty obvious. But you can also search a resource for any of the datatype references it contains.
So, how do you know which datatypes are used in a particular resource? Why, Help | About This Resource, of course. (And you thought I wasn’t going to answer Wendell’s question!)
The following Data Types section is from the Dictionary of Biblical Languages: Hebrew Old Testament resource. I’m running the 2.2 alpha, so it may look slightly different in your version: