I’ve updated Skidoo Too (and only that layout because I’m lazy) with a little bit of nifty. It’s a font size selector. You’ll see at the bottom of the left column a group of 3 icons. Clicking on one of the icons will change the font size used for the page.
document.body.style.fontSize variable to some string value, like “110%”, to set the font size.
This assumes that you’re using percent or EMs to define your font sizes in your CSS. (Which of course you are.)
It’s quick, it’s easy, and probably worth the 2 seconds it takes to implement.