Pretty good because I'm in the habit of scrolling down approximately a windowful (using the Page Down key) then when that scrolls a little too far (because I h

Pretty good because I'm in the habit of scrolling down approximately a windowful (using the Page Down key) then when that scrolls a little too far (because I have low vision and consequently have the text size set unusually large, which many web sites don't handle correctly) using the up arrow key to find my place again.