Bob's info is very good if you have a wheel mouse, but if you haven't and are still having problems,

If using " Firefox " - just go to the top of the page and click on VIEW then just run down it to you see TEXT SIZE , you have an option to increase or decrease the FONT size,

If using Internet exployer ",- its the same deal but the options are " largest, larger, medium, smaller, smallest.", i think by default in Internet Exployer its set on medium., so there's 2 sizes larger to go for.