Simple Zoomer is the new WordPress widget plugin by Chandra Sekhar Gudavalli that lets you add a widget and allows you readers to change your blog content font size by clicking the + & – buttons.
Installation & Usage: Install and activate Simple Zoomer plugin. After activation visit your admin area Dashboard -> Appearance -> Widgets page and drag its widget to your sidebar. Now your visitors can increase or decrease font size in the frontend by clicking its small + & – buttons.