ChmZoomer is a browser plug-in that allows to change font size when reading CHM files. ChmZoomer gives you handy full page zoom functionality for all browser-based applications, such as e-Books and RSS Readers. The shortcut keys are the same as IE and Firefox, [CTRL +] or [CTRL Mouse wheel up] to zoom in. Press [CTRL -] or [CTRL Mouse wheel down] to zoom out. Reset zoom to 100% with Ctrl-0.

ChmZoomer gives you handy full page zoom functionality for all browser-based applications, such as e-Books and RSS Readers.