This document describes GeneXus X Evolution 2 Upgrade 4 which includes 71 new features and improvements, 410 customer requested changes (SACs), and 1140 bugs fixed based on feedback from 257 preview testers. Some key improvements include enhanced Android maps, new slide navigation styles, drag and drop functionality, autogrow properties for grids, invisible mode for controls, new control value changed event, security improvements around URL encryption, delegated authorization for GAM, and new timeline comparisons. The upgrade also features many IDE improvements like a form and layout comparer and various usability enhancements.