I've been changing a site from using px to em to enable zooming in browswers. I now realise that browsers are adding a few options for users to zoom and I wonder if anyone knows of a good tutorial to help me get my head around all that. It seems that there is the increase text size option and now a zoom of the whole page. Is it enough to just change to using em for this to be functional?
My question about Firefox is that when I zoom the page in that, the page expands horizontally and vertially but the part of the page that then does not fit on the screen doesn't render. Consequently, when you scroll horizontally, the page is blank.