For a design oriented article, it has an absolutely horrible design. The article itself is poorly written with contradictions. For example, the author writes about a 90's IBM Thinkpad but gives a screenshot of a Lenovo Thinkpad. The asus keyboard does have a page up/page down function (The up/down arrow used in combination with the function key provides this functionality)

on mine there is not even a end/home key and also no pgdn/pgup key... writing is terribley slow with it

theres a solution i saw before on autohotkey forums where a small app runs on the desktop in always on top mode - with 4 buttons that are pgup pgdn home end, or you can bind a hotkey to them