Select the folders you want to compare in the Project tool window.
From the context menu, choose Compare Directories, or press Ctrl+D.
Use the following toolbar buttons to filter the list:
: click to display files that are present in the left folder, but are missing from the right one.
: click to display files that are present in the right folder, but are missing from the left one.
: click to display files that are present in both folders, but whose contents, timestamp or size are different.
: click to display files that are present in both folders and that are identical with regard to the option selected in the Compare by dropdown.
Comparing files, folders and text sources
原文：https://www.cnblogs.com/kakaisgood/p/12175604.html