In a similar way as for files, drag-and-drop of one changelist on top of another in the History tab will show us a folder diff, as shown:
In the preceding example, I clicked on changelist
830 and am about to drop it onto changelist
709. Completing the drop action causes P4V to run the Folder Diff tool, which performs a recursive diff on all files in the folder and any sub-folders.
This is a very powerful tool which works well and performs quickly even for folders with tens of thousands of files in them.
Following on from the previous section we can see an example ...