Use the comparison window's toolbar and difference list to choose among the differences between the source and destination files and apply changes to the destination file.

To view a difference between the two files, click its entry in the difference list. To apply the difference, click the Apply button in the toolbar or choose Apply Difference from the Search Menu. To reverse a difference you've already applied, click the Unapply button or choose Unapply Difference from the Search Menu.

To compare two files that are already open in editor windows, click on the Editor Files pop-up menu next to the source and destination paths, as shown in Figure 4.15. A list of open editor windows appears. Choose a file name from the menu to make it the source or destination file. Click Compare after choosing the source and destination files to display the comparison window.