Zend certified PHP/Magento developer

How to configure WinMerge to treat lines as single differences?

I’m using WinMerge and fighting with it’s desire to treat groups of line differences as a single difference block. For my needs this behavior makes it difficult to merge, I want to go one line at a time. I’ve read the help and searched the web, but can’t figure out how to control this option.

Is this not configurable? No way to work with differences one line at a time?