The 1.6 Release includes several major enhancements:
Synchronized vertical scrolling(with Merge view)
Next/Previous change logical scrolling works with Merge view
New, filename header for the Merge window
Command line options for disabling merges during a compare and visa versa
New progress displays(on the right side of status bar)
Progress bar display while SureMerging
Optimized SureMerge process
Command line options for: EOL Writes, Views, and Saved Settings
New, Changes choice list navigation component
Merge resolutions in any order enabled - with visual indicators (todo/done) for each change
New Merge Buttons - color coded, simpler text, tip text, AltKey mnemonics
New, Synchronized Horizontal scrolling
Change blocks not merged have a "wrapper" in the saved merge file
New, Merge Undo for doing a change block over(changes to be removed
displayed with Strike-Through)
Source: