Let me help you be sure.

When I want to copy a lot of text--including text that is below the bottom of the screen (i.e. not yet visible)--I have to double-tap on visible text and drag stylus down to bottom of the screen. Sometimes it can take a while to scroll all the way to the end of the text I want to highlight. And sometimes the darn thing just doesn't scroll, so I never get to see the text that's not yet visible.

But with the d-pad tweak active, I just double-tap, and then scroll down with d-pad. This results in large portions of text being highlighted without my having to drag the stylus at all. Text is highlighted simply because I scrolled using the d-pad.

That make sense?