Is it possible to scroll window screen without using `control + U` or `control + D`, (or `control + F,B,E` etc). I am aware that I can use 'j' or 'k', but that is a line by line scroll. I am looking to scroll through a larger chunk of text without using `control` key. I find it little inconvenient to move from home row. (May be I am thinking too much.) 

I am aware that I can use `/`search or `nG` to move to a particular line. But sometimes, it is helpful to scroll through the code, without a specific line.

I am using GVim (windows). Thank you.