ChromeVis adds a zoomed-in reading box to Google Chrome
Since this is an official Google extension, it's no surprise that ChromeVis supports several keyboard shortcuts. The lens area can be toggled on an off by pressing 0 (or by clicking the icon in your browser actions area), move ahead to the next sentence by pressing shift + s or back with shift +a (moving by words and paragraphs is also supported), and increase/decrease the lens text size with = and - .
Color settings are customizable, and you can also allow the lens to either float or lock it in place above the currently highlighted text.
ChromeVis is actually a nice speed reading-type extension for Chrome, especially if you're OK with keyboard controls.