Dominion To change the font size for individual elements, custom CSS as suggested by luceos is your best bet. Adding an option to adjust the font size overall might be something worth looking into in the future.
betest Sorry for late. It can be the the title of each post or the font size for the regular post content. The zooming works fine but if there's an option that the webmaster can set the size a bit lager, that'll be very help.