The first thing you need to do during comparison, synchronization and migration operations is select operation scope.
First pick up the desired object in the left panel of the project window.
Then pick up the appropriate object from the metadata tree in the right panel of the project window.
If the operation can be produced for the selected scope, you’ll be forwarded to the matching page.
Otherwise, if the operation cannot be produced with the selected objects, you will see this warning message:
Now you have to choose other nodes in the metadata trees in the left or right panels (repeating items 1 and 2).