Beta Feature: Sync Buttons in Directory Comparison
Simply click on the arrow-shaped button for any diff block, and the block's contents are copied in that direction:
Note that, while the icons for the sync buttons and the Copy to First/Second commands look similar, the two commands are different: the sync buttons are for copying diff blocks, while the Copy to First/Second commands are for copying selected items.
Also note that, just as with the Copy to First/Second commands, copying a deleted block is equivalent to deleting the opposite block's contents:
By default, synchronization buttons will be enabled for both file and directory comparison. Sync buttons now have separate enable/disable checkboxes for file and directory comparison, under Options | View: