Zoom! I want to zoooom!

How can I zoom??? I just bought an ebook comic and can't read it because zooming is disabled. Has it occured to you that zooming might be a useful feature? How can you turn something as simple as a book into a frustrating hell!!!??? I want to read my book, or I want my money back! Dilettants! I hope you go broke because you deserve it for developing a crappy thing like Digital Editions!