One of the nice things about the NEC software is when there is a reference to another code section, that code section is a link.
For instance, if you were looking at 110.26(A)(3), there's a reference to 110.26(E). The referenced article is a link, and by clicking on it, it takes you right to that section. You will then be able to 'link back' from there to where you were.
Another couple of things that are nice is, say you're looking at Table 310.16. The headings, as you scroll down on your screen, will stay at the top, while the columns under the headings move up. So if you were looking at the ampacity of the larger wires, the headings are still there and you don't need to scroll up and down to make sense of the table. This is great for the 3- and 4-page tables in the back.
Plus, you can highlight any section you want with an electronic highlighter (I think 3 or 4 colors are available). You can also bookmark sections with your own titles.