How do I change the font size on my screen?

Web page data is much smaller now ~ I want to change it back but do know how.How do I change the font size on my screen?
Try right clicking and going to preferences like you would be changing your wallpaper or something...then at the top there should be somewhere to go to change font size :)How do I change the font size on my screen?
On your browser click on ';page'; then ';text size';