More space to bottom if writing in last line

Especially when writing fullscreen: 

It annoys me to have the cursor at the very bottom of the screen when I'm writing a longer file at the end (e.g. for writing short stories, journals). I like to have the text I'm writing at almost in the center for the screen.

So I'd love to have the option to add a fixed height at the bottom of the page to force the text I'm writing appear almost in the center.