Lightroom 4 and How it Processes Older Image Files

The History Photographers who have been using Lightroom for at least two years have images originally processed through Lightroom 2, Lightroom 3, and Lightroom 4 in their image libraries. Its important to understand how Lightroom 4 (V4.1 is actually used in all testing and examples) interacts with these legacy files. Moving from Lightroom 2 (which