Mac vs PC .... zoom.

Christine... Very interesting site... I wanted to add something to what you wrote about the site being accommodating to the vision impaired.... I'm not sure if a PC can do this, but with a MAC you press "Apple" and "+" and it will make the text larger....MUCH larger than what this site did. May parents are getting older and they appreciate this feature (I recently gave them my old Mac). Also, you can zoom in on something while making presentations if you want. I'd be interested if PC's can do these things....anyone?