There are some times when I’d like to view different parts of the same file while editing. This can be accomplished by setting up a multi-pane layout using View > Layout. Then when a file opened in a tab do File > New View Into File. This will create a second tabbed view of the file, you can then drag this tab into the second pane you opened earlier.
Each tabbed view will scroll independently, as it should, but changes to the file will show in both views.