Scroll Documents provides you with a powerful comparison tool to track changes between the different versions of a document.
To compare a particular version with a different version, first open it in the Document Viewer.
Then click the actions menu ••• in the viewer and select Compare:
In the compare tool, select the version you want to compare it with.
Then, you can either scroll through the result to see all the changes, or use the Previous/Next buttons on the bottom action bar to navigate between the changes.
You can also compare a document with its copies. To do so, simply select the other document in the document drop down in the compare tool.