Hyperlinks - definition of my types
You'll find that different sorts of hyperlinks behave in different ways. Some will change the existing window, some may open up new windows, others may invoke a pop-up window.
For example, links in the footer frame of my pages will change the content of the existing window. Whereas some cross-reference links clicked from the main page open a new window. If linking to a page which only has a few words on it, like a comment or a wee aside, I may choose just to open a pop-up window. The user would simply close this to fully see the main page still behind it. For example try this pop-up-link^
I've intended some design consistency, so, once you've got the hang it, you shouldn't be surprised by the behaviour.
It's worth looking at the types of link, or rather some more ways of considering them. For example, there are internal links to other pages in this site and there are external links to pages on other sites. As well as this, I class internal links as either primary or cross-reference.
As suggested elsewhere, the site has a hierarchical structure, so you could work your way through the pages systematically via all the primary links and visit every one of my pages.
Sometimes of course a linked page may in reality relate to more than one
subject, and I have put it primarily in one subject and linked it primarily from
one page (maybe somewhat arbitrarily)
but have included perhaps one or more cross-referenced links from other areas.
Every page on this site has at least one primary link to it. There may or
may not be other routes to the same page via cross-reference links.
So a link could be internal-primary, internal-cross-reference, or, external. I may simplify the link classifications as, primary, meaning (always) internal primary, and cross-reference meaning either external or internal cross-reference.
I use the simpler 'cross-reference' term because the way external and internal cross-reference links behave, particularly in terms of opening new windows, is pretty much the same. That is, external and internal cross-references will open new windows. Where I have not explicitly described the behaviour of 'external' links, you can assume it to be the same as (and incorporated in the term) 'cross-reference' links.
Hyperlinks may be underlined depending on your browser and how you have its options set up.